Q: Is 515,840 a Composite Number?

Why is 515,840 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 515,840 can be evenly divided by 1 2 4 5 8 10 13 16 20 26 31 32 40 52 62 64 65 80 104 124 128 130 155 160 208 248 256 260 310 320 403 416 496 520 620 640 806 832 992 1,040 1,240 1,280 1,612 1,664 1,984 2,015 2,080 2,480 3,224 3,328 3,968 4,030 4,160 4,960 6,448 7,936 8,060 8,320 9,920 12,896 16,120 16,640 19,840 25,792 32,240 39,680 51,584 64,480 103,168 128,960 257,920 and 515,840, with no remainder.

Since 515,840 cannot be divided by just 1 and 515,840, 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).