Q: Is 400,000 a Composite Number?

Why is 400,000 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 400,000 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 320 400 500 625 640 800 1,000 1,250 1,600 2,000 2,500 3,125 3,200 4,000 5,000 6,250 8,000 10,000 12,500 16,000 20,000 25,000 40,000 50,000 80,000 100,000 200,000 and 400,000, with no remainder.

Since 400,000 cannot be divided by just 1 and 400,000, 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).