Q: Is 646,400 a Composite Number?

Why is 646,400 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 646,400 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 101 128 160 200 202 256 320 400 404 505 640 800 808 1,010 1,280 1,600 1,616 2,020 2,525 3,200 3,232 4,040 5,050 6,400 6,464 8,080 10,100 12,928 16,160 20,200 25,856 32,320 40,400 64,640 80,800 129,280 161,600 323,200 and 646,400, with no remainder.

Since 646,400 cannot be divided by just 1 and 646,400, 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).