Q: Is 399,940 a Prime Number?
A: No, 399,940 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 399940 can be evenly divided by 1 2 4 5 10 20 19,997 39,994 79,988 99,985 199,970 and 399,940, with no remainder.
Since 399,940 cannot be divided by just 1 and 399,940, it is not a prime number.