Q: Is 640,872 a Composite Number?

Why is 640,872 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 640,872 can be evenly divided by 1 2 3 4 6 8 9 12 18 23 24 27 36 43 46 54 69 72 81 86 92 108 129 138 162 172 184 207 216 258 276 324 344 387 414 516 552 621 648 774 828 989 1,032 1,161 1,242 1,548 1,656 1,863 1,978 2,322 2,484 2,967 3,096 3,483 3,726 3,956 4,644 4,968 5,934 6,966 7,452 7,912 8,901 9,288 11,868 13,932 14,904 17,802 23,736 26,703 27,864 35,604 53,406 71,208 80,109 106,812 160,218 213,624 320,436 and 640,872, with no remainder.

Since 640,872 cannot be divided by just 1 and 640,872, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).