Q: Is 72,400 a Prime Number?
A: No, 72,400 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 72400 can be evenly divided by 1 2 4 5 8 10 16 20 25 40 50 80 100 181 200 362 400 724 905 1,448 1,810 2,896 3,620 4,525 7,240 9,050 14,480 18,100 36,200 and 72,400, with no remainder.
Since 72,400 cannot be divided by just 1 and 72,400, it is not a prime number.