Q: Is 398,820 a Prime Number?
A: No, 398,820 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 398820 can be evenly divided by 1 2 3 4 5 6 10 12 15 17 20 23 30 34 46 51 60 68 69 85 92 102 115 138 170 204 230 255 276 289 340 345 391 460 510 578 690 782 867 1,020 1,156 1,173 1,380 1,445 1,564 1,734 1,955 2,346 2,890 3,468 3,910 4,335 4,692 5,780 5,865 6,647 7,820 8,670 11,730 13,294 17,340 19,941 23,460 26,588 33,235 39,882 66,470 79,764 99,705 132,940 199,410 and 398,820, with no remainder.
Since 398,820 cannot be divided by just 1 and 398,820, it is not a prime number.