Q: Is 398,750 a Prime Number?
A: No, 398,750 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 398750 can be evenly divided by 1 2 5 10 11 22 25 29 50 55 58 110 125 145 250 275 290 319 550 625 638 725 1,250 1,375 1,450 1,595 2,750 3,190 3,625 6,875 7,250 7,975 13,750 15,950 18,125 36,250 39,875 79,750 199,375 and 398,750, with no remainder.
Since 398,750 cannot be divided by just 1 and 398,750, it is not a prime number.