Q: Is 408,400 a Prime Number?
A: No, 408,400 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 408400 can be evenly divided by 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 1,021 2,042 4,084 5,105 8,168 10,210 16,336 20,420 25,525 40,840 51,050 81,680 102,100 204,200 and 408,400, with no remainder.
Since 408,400 cannot be divided by just 1 and 408,400, it is not a prime number.