Q: Is 400,678 a Prime Number?
A: No, 400,678 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 400678 can be evenly divided by 1 2 89 178 2,251 4,502 200,339 and 400,678, with no remainder.
Since 400,678 cannot be divided by just 1 and 400,678, it is not a prime number.