Q: Is 321,408 a Composite Number?

Why is 321,408 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 321,408 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 31 32 36 48 54 62 64 72 81 93 96 108 124 128 144 162 186 192 216 248 279 288 324 372 384 432 496 558 576 648 744 837 864 992 1,116 1,152 1,296 1,488 1,674 1,728 1,984 2,232 2,511 2,592 2,976 3,348 3,456 3,968 4,464 5,022 5,184 5,952 6,696 8,928 10,044 10,368 11,904 13,392 17,856 20,088 26,784 35,712 40,176 53,568 80,352 107,136 160,704 and 321,408, with no remainder.

Since 321,408 cannot be divided by just 1 and 321,408, 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).