The Number 4

Also known as...

• In words... English: four
  
• Roman numeral: IV

Other bases...

• Base 2 (binary): 100

• Base 8 (octal): 4

• Base 16 (hexadecimal): 4

· Interesting facts and trivia...

4 is an even number

Prime or composite? Composite. The factors are: 2 2

4 = 22

Other interesting facts and trivia...
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The number FOUR is the only number in the English language that is spelt with the same number of letters as the number itself

4 is the smallest number of colours sufficient to colour all planar maps.

Want to find out more then these many of these facts come from Richard Phillip's book. Check out details on his website by clicking the picture link.