Q: Is 78,428 a Prime Number?

A: No, 78,428 is not a prime number.

Why is 78,428 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 78428 can be evenly divided by 1 2 4 7 14 28 2,801 5,602 11,204 19,607 39,214 and 78,428, with no remainder.

Since 78,428 cannot be divided by just 1 and 78,428, it is not a prime number.

Number	78,426	78,427	78,429	78,430
Prime?	no	yes	no	no

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

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