Q: Is 400,072 a Prime Number?
A: No, 400,072 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 400072 can be evenly divided by 1 2 4 8 43 86 172 344 1,163 2,326 4,652 9,304 50,009 100,018 200,036 and 400,072, with no remainder.
Since 400,072 cannot be divided by just 1 and 400,072, it is not a prime number.