## Number of the Month Archive (2016/2017)

### Number of the Month (September 2017)

This week’s number is 56.

56 is the sum of the first six triangular numbers.

1 + 3 + 6 + 10 + 15 + 21

56 is the sum of the six prime numbers.

3 + 5 + 7 + 11 + 13 + 17

The factors of 56 are 1, 2, 4, 7, 8, 14, 28 and 56.

56 in Roman numerals is expressed as LVI.

56 is 111 000 in binary.

56 spectators died in the Bradford City football stadium fire on 11 May 1985.

56 is the atomic number of Barium.

56 is the international dialling code of Chile.

Shirley Temple (US child actress) had 56 curls in her hair.

56 men signed the US Declaration of Independence in 1776.

Steve Jobs died aged 56.

### Number of the Month (July 2017)

This month's number is 54.

54 is a Leyland number. 54 can be written as the sum of three squares in three different ways:

72 + 22 + 12 = 62 + 32 + 32 = 52 + 52 + 22 = 54.

It is the smallest number with this property.

The factors of 54 are 1, 2, 3, 6, 9, 18, 27 and 54.

There are 54 countries in Africa.

54 in Roman numerals is expressed as LIV.

54 is 110110 in binary.

54 is the atomic number of Xenon.

A score of 54 in golf is colloquially referred to as a perfect round.

This score has never been achieved in competition.

54 is the international dialling code of Argentina.

### Number of the Month (June 2017)

This week’s number is 38.

38 is the sum of the squares of the first three primes.

38 is the largest even number that cannot be written as the sum of two odd composite numbers.

The factors of 38 are 1, 2, 19 and 38

38 in Roman numerals is expressed as XXXVIII

38 is 100110 in binary.

38 is the atomic number of Strontium.

38 is the number of games of football played by each team, each season in the EPL (English Premier League) and La Liga (Spain).

38 is the number of slots on an American roulette wheel. (1 to 36, 0, 00)

### Number of the Month (April 2017)

This week’s number is 45.

45 is a triangular number, and in particular the sum of all the decimal digits

(0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45)

The factors of 45 are 1, 3, 5, 9, 15 and 45

45 in Roman numerals is expressed as XLV

45 is 101101 in binary.

45 is the atomic number of Rhodium.

There are 45 degrees in half of a right angle.

+45 is the telephone dialing code for Denmark.

A football game consists of two halves of 45 minutes each.

World War Two ended in 1945.

### Number of the Week (20 March 2017)

This week’s number is 59.

59 is the 17th prime number.

The factors of 59 are 1 and 59

59 in Roman numerals is expressed as LIX

59 is 111011 in binary.

59 is the atomic number of Praseodymium.

A 59 sided polygon is called a nonogon

Beethoven’s Opus59 consists of the three so-called Razumovsky Quartets

The 1960s song “59th" Street Bridge Song (Feelin’ Groovy)” was a big hit for Simon and Garfunkel

59 is apporoximately the number of days in 2 lunar months.

In the USA the Interstate 59 runs between Minnesota and Texas.

59 is the lowest recorded golf score on the womens’ LPGA tour by Annika Sorenstam.

### Number of the Week (13 March 2017)

This week’s number is 9.

9 is a composite number.

The factors of 9 are 1, 3 and 9

9 is a perfect square (32).

9 in Roman numerals is expressed as IX

9 is 1001 in binary.

9 is the atomic number of Flourine.

A 9 sided polygon is called a nonogon

### Number of the Week (27 February 2017)

This week’s number is 27.

The factors of 27 are 1, 3, 9, and 27

27 is a perfect cube (33).

27 in Roman numerals is expressed as XXVII.

27 is 11011 in binary.

27 is the atomic number of Cobalt.

27 is the only positive integer that is three times the sum of its digits.

Dark matter is thought to make up 27% of the universe.

27 is the number of letters in the Spanish alphabet.

### Number of the Week (21 November 2016)

This week’s number is 30.

The factors of 30 are 1, 2, 3, 5, 6, 10, 15 and 30

30 is the number of tracks on the Beatles’ famous The White Album.

30 in Roman numerals is expressed as XXX.

30 is 11110 in binary.

30 is the atomic number of Zinc

The Platonic solids, the dodecahedron and the icosahedron both have 30 faces

30 years of marriage is called the pearl anniversary.

### Number of the Week (7 November 2016)

This week’s number is 41.

The factors of 41 are 1 and 41

41 is the 13th smallest prime number.

41 is the sum of the first six prime numbers.

41 is the sum of two squares 16 and 25.

41 in Roman numerals is expressed as XL1.

41 is 101001 in binary.

41 is the atomic number of Niobium

Symphony 41 is the longest and last symphony of Wolfgang Amadeus Mozart.

41 was The race number worn by Sir Roger Bannister when he broke the mythical 4-minute mile barrier in 1954.

George H W Bush was the 41st President of the United States

### Number of the Week (31 October 2016)

This week’s number is 111.

The factors of 111 are 1, 3, 37 and 111

111 in Roman numerals is expressed as CX1.

111 is 1101111 in binary.

111 is the atomic number of Roentgenium (rg).

The emergency telephone number in New Zealand is 111.

A score of 111 in cricket or multiples thereof (222 = "double nelson", 333 = "triple nelson" and so on) is considered unlucky by some in English cricket: most famously by the international umpire David Shepherd who had a whole retinue of peculiar mannerisms - hops, shuffles, jiggles and so on - that he would indulge in if the score was ever a "Nelson" multiple.
Particularly if the number of wickets also matched - 111/1, 222/2 etc.

Occasionally 111 is referred to as "eleventy- one", as read in The Fellowship of the Ring by J.R.R. Tolkien

111 is the lowest positive integer requiring six syllables to name in American English, or seven syllables (including "and") in Canadian and British English.

### Number of the Week (25 October 2016)

This week’s number is 75.

The factors of 75 are 1, 3, 5, 15, 25 and 75.

52 in Roman numerals is expressed as LXXV.

52 is 1001011 in binary.

52 is the atomic number of rhenium.

The age limit for Canadian senators is 75.

### Number of the Week (17 October 2016)

This week’s number is 52.

The factors of 52 are 1, 2, 4, 13, 26 and 52.

52 in Roman numerals is expressed as LII.

52 is 110100 in binary.

52 is the atomic number of tellurium.

A year has approximately 52 weeks.

On a piano there are 52 white keys.

52 is the international direct dial code for Mexico.

There are 52 cards in a standard pack of playing cards.

### Number of the Week (12 September 2016)

This week’s number is 29

29 is the tenth prime number

The factors of 29 are 1 and 29.

29 in Roman numerals is expressed as XXIX.

29 is 11101 in binary.

29 is the atomic number of copper.

None of the first 29 natural numbers have more than two different prime factors.

This is the longest such consecutive sequence.

India has 29 states.

29 Palms is the name of a town in California, in the USA.

The Lunar month is close to 29 days.

### Number of the Week (29 August 2016)

This week’s number is 90

The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45 and 90.

90 in Roman numerals is expressed as XC

90 is 1011010 in binary.

90 is the atomic number of thorium.

90 is the direct dial number for Turkey.

90 is the latitude in degrees of the North and South poles.

There are 90 minutes in a football match.

### Number of the Week (22 August 2016)

This week’s number is 92.

The factors of 92 are 1 and 92.

92 is a pentagonal number

92 in Roman numerals is expressed as XC11

92 is 1011100 in binary.

92 is the atomic number of uranium.

92 is the direct dial number for Pakistan.

92 letters in the longest place name in the world in New Zealand:

Taumatawhakatangihangakoauauotamateaurehaeaturipukakapikimaungahoronukupok

The 92 Club is a society of UK football fans who have attended a home match of all 92 current member clubs of the Premier League and The Football League in England and Wales.

### Number of the Week (27 June 2016)

This week’s number is 73

The factors of 73 are 1 and 73.

73 is the 21st prime number.

73 in Roman numerals is expressed as LXXIII.

73 is 1001001 in binary.

73 is the atomic number of tantalum.

73 is the number of seconds it took for the Space Shuttle Challenger shuttle to explode.

### Number of the Week (13 June 2016)

This week’s number is 16.

The factors of 16 are 1, 2, 4, 8 and 16.

16 is the fourth power of 2.

16 in Roman numerals is expressed as XVI.

16 is 10000 in binary.

16 is the atomic number of sulphur.

### Number of the Week (9 May 2016)

This week’s number is 44

The factors of 44 are 1, 2, 4, 11, 22 and 44

44 is a composite number

44 in Roman numerals is expressed as XLIV

44 is 101100 in binary

44 is the atomic number of ruthenium

44 is a palindromic number and also a “happy” number.

44 is the driver number of Lewis Hamilton , the Formula One racing car driver.

44 is the direct dialing code for the United Kingdom.

Route 44 is the Interstate Highway in the US that runs from Texas to Missouri.

44 fours is the name of a song by Jay Z where he rhymes the words four, for and fore 44 times.

Vicks Formula 44 is a popular cough medicine.

Barack Obama is the 44th President of the United States.

### Number of the Week (11 April 2016)

This week’s number is 22

The factors of 22 are 1, 2, 11 and 22

22 is a composite number

22 in Roman numerals is expressed as XXII

22 is 10110 in binary

22 is the atomic number of titanium

22/7 is used as an approximation for the irrational number π

The 22 is an important line on a rugby field, 22 metres from each try-line

In Australian Rules football, each squad is allowed 22 players

22 yards is the length of a cricket pitch

Taylor Swift has a song on her fourth album Red called 22

Catch 22 is a famous novel by Joseph Heller

There are 22 yards in a chain

There are 22 players on the field at any one time in a soccer game and an American football game..

### Number of the Week (4 April 2016)

This week’s number is 51

The factors of 51 are 1, 3, 17 and 51

51 is a composite number

51 in Roman numerals is expressed as LI

51 is 110011 in binary

51 is the atomic number of antimony

51 is the direct dial code for Peru

51 is the title of a 2011 Horror movie

51st State is the name given to any future state of the US

51 is the name of an episode of the TV series Breaking Bad

### Number of the Week (21 March 2016)

This week’s number is 67.

The factors of 67 are 1 and 67.

67 is the 19th prime number.

67 in Roman numerals is expressed as LXVII

67 is 1000011 in binary.

67 is the atomic number of holmium, a lanthanide.

Two songs are, “Questions 67 and 68” by the band Chicago and “Old 67” by Elton John

67 is the highest two digit number presently NOT designating a highway in the US.

67 is the number of throws in Judo

### Number of the Week (7 March 2016)

This week’s number is 79.

The factors of 79 are 1 and 79

79 is the 22nd prime number

79 in Roman numerals is expressed as LXXIX

79 is 1001111 in binary.

79 is the atomic number of gold (Au).

79 is the record number of cumulative weeks at Number 1 on the music charts held by Elvis Presley

### Number of the Week (29 February 2016)

This week’s number is 85.

The factors of 85 are 1, 5, 17 and 85

The prime factors are 5 x 17

85 in Roman numerals is expressed as LXXXV

85 is 1010101 in binary.

85 is the atomic weight of astatine

85 is a biprime, the product of two prime numbers 5 and 17.

85 along with 86 and 87 is the second cluster of consecutive biprimes.

In base 2, 85 is a palindrome (1010101)

85 is a centred triangular number.

### Number of the Week (22 February 2016)

This week’s number is 63.

The factors of 63 are 1, 3, ,7, 9, 21 and 63

The prime factors are 32 x 7

63 in Roman numerals is expressed as LXIII

63 is 111111 in binary.

63 is the atomic weight of europium.

63 is the smallest whole number that can be divided by any number from 1 to 9 without repeating decimals.

The Philippines has 063 as its international dialling code.

There are 63 chromosomes in a donkey and a horse.

### Number of the Week (8 February 2016)

This week’s number is 28.

The factors of 28 are 1, 2, 4,7, 14 and 28

28 in Roman numerals is expressed as XXVIII

28 is 11100 in binary.

28 is the atomic weight of silicon.

There are 28 countries in the European Union (June 2015). Croatia being the latest.

No country has 028 as its international dialing code.

There are 28 dominoes in a standard set of dominoes.

28 is the sum of the first 5 prime numbers.

28 is the number of days in the shortest month of the year (except in Leap years).

28 was the number of sports at the Sydney (2000) Olympics.

The normal number of human teeth (excluding wisdom) is 28.

It takes 28 Earth years for Saturn to revolve around the Sun.

### Number of the Week (1 February 2016)

This week’s number is 70.

The factors of 70 are 1, 2, 5, 7, 10, 14, 35 and 70

70 in Roman numerals is expressed as LXX

70 is 1000110 in binary.

702 is the sum of the first 24 square numbers starting at 1.

The Old Testament of the Bible allots three score and ten (70 years) for a man's life.

In Olympic Archery, the targets are 70 metres from the archers.

70 is the atomic number of ytterbium, a lanthanide.