4 is the integer the proceeds 3 and preceeds 5. The prime factorization is 22. A number is divisible by 4 if the last 2 digits are divisible by 4. 4 is a highly composite number, meaning that it has more factors than all the numbers smaller than it. (Which is only one, two, and three.) 4 is the smallest composite number. 4 is the only number with its number of letters in its name.  

Times Tables

* 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
4 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80


Community content is available under CC-BY-SA unless otherwise noted.