Q: Is 400,240 a Prime Number?
A: No, 400,240 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 400240 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 5,003 10,006 20,012 25,015 40,024 50,030 80,048 100,060 200,120 and 400,240, with no remainder.
Since 400,240 cannot be divided by just 1 and 400,240, it is not a prime number.