Q: Is 312,390 a Composite Number?

Why is 312,390 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 312,390 can be evenly divided by 1 2 3 5 6 9 10 13 15 18 26 27 30 39 45 54 65 78 89 90 117 130 135 178 195 234 267 270 351 390 445 534 585 702 801 890 1,157 1,170 1,335 1,602 1,755 2,314 2,403 2,670 3,471 3,510 4,005 4,806 5,785 6,942 8,010 10,413 11,570 12,015 17,355 20,826 24,030 31,239 34,710 52,065 62,478 104,130 156,195 and 312,390, with no remainder.

Since 312,390 cannot be divided by just 1 and 312,390, 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).