Q: Is 381,920 a Prime Number?
A: No, 381,920 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 381920 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 28 31 32 35 40 44 55 56 62 70 77 80 88 110 112 124 140 154 155 160 176 217 220 224 248 280 308 310 341 352 385 434 440 496 560 616 620 682 770 868 880 992 1,085 1,120 1,232 1,240 1,364 1,540 1,705 1,736 1,760 2,170 2,387 2,464 2,480 2,728 3,080 3,410 3,472 4,340 4,774 4,960 5,456 6,160 6,820 6,944 8,680 9,548 10,912 11,935 12,320 13,640 17,360 19,096 23,870 27,280 34,720 38,192 47,740 54,560 76,384 95,480 190,960 and 381,920, with no remainder.
Since 381,920 cannot be divided by just 1 and 381,920, it is not a prime number.