Q: Is 721,440 a Composite Number?

Why is 721,440 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 721,440 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 90 96 108 120 135 144 160 167 180 216 240 270 288 334 360 432 480 501 540 668 720 835 864 1,002 1,080 1,336 1,440 1,503 1,670 2,004 2,160 2,505 2,672 3,006 3,340 4,008 4,320 4,509 5,010 5,344 6,012 6,680 7,515 8,016 9,018 10,020 12,024 13,360 15,030 16,032 18,036 20,040 22,545 24,048 26,720 30,060 36,072 40,080 45,090 48,096 60,120 72,144 80,160 90,180 120,240 144,288 180,360 240,480 360,720 and 721,440, with no remainder.

Since 721,440 cannot be divided by just 1 and 721,440, 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).