Q: Is 278,818 a Prime Number?
A: No, 278,818 is 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 278818 can be evenly divided by 1 2 139,409 and 278,818, with no remainder.
Since 278,818 cannot be divided by just 1 and 278,818, it is not a prime number.