Q: Is 28,815 a Prime Number?

A: No, 28,815 is not a prime number.

Why is 28,815 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 28815 can be evenly divided by 1 3 5 15 17 51 85 113 255 339 565 1,695 1,921 5,763 9,605 and 28,815, with no remainder.

Since 28,815 cannot be divided by just 1 and 28,815, it is not a prime number.

Number	28,813	28,814	28,816	28,817
Prime?	yes	no	no	yes

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

General Questions

Factoring Questions

Calculation Questions

Miscellaneous Questions