Q: Is 128,128 a Composite Number?

Why is 128,128 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 128,128 can be evenly divided by 1 2 4 7 8 11 13 14 16 22 26 28 32 44 52 56 64 77 88 91 104 112 128 143 154 176 182 208 224 286 308 352 364 416 448 572 616 704 728 832 896 1,001 1,144 1,232 1,408 1,456 1,664 2,002 2,288 2,464 2,912 4,004 4,576 4,928 5,824 8,008 9,152 9,856 11,648 16,016 18,304 32,032 64,064 and 128,128, with no remainder.

Since 128,128 cannot be divided by just 1 and 128,128, 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).