Q: Is 328,720 a Prime Number?
A: No, 328,720 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 328720 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 280 560 587 1,174 2,348 2,935 4,109 4,696 5,870 8,218 9,392 11,740 16,436 20,545 23,480 32,872 41,090 46,960 65,744 82,180 164,360 and 328,720, with no remainder.
Since 328,720 cannot be divided by just 1 and 328,720, it is not a prime number.