Q: Is 428,820 a Prime Number?
A: No, 428,820 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 428820 can be evenly divided by 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 210 420 1,021 2,042 3,063 4,084 5,105 6,126 7,147 10,210 12,252 14,294 15,315 20,420 21,441 28,588 30,630 35,735 42,882 61,260 71,470 85,764 107,205 142,940 214,410 and 428,820, with no remainder.
Since 428,820 cannot be divided by just 1 and 428,820, it is not a prime number.