A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3790080 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 32 35 36 40 42 45 47 48 56 60 63 64 70 72 80 84 90 94 96 105 112 120 126 128 140 141 144 160 168 180 188 192 210 224 235 240 252 256 280 282 288 315 320 329 336 360 376 384 420 423 448 470 480 504 560 564 576 630 640 658 672 705 720 752 768 840 846 896 940 960 987 1,008 1,120 1,128 1,152 1,260 1,280 1,316 1,344 1,410 1,440 1,504 1,645 1,680 1,692 1,792 1,880 1,920 1,974 2,016 2,115 2,240 2,256 2,304 2,520 2,632 2,688 2,820 2,880 2,961 3,008 3,290 3,360 3,384 3,760 3,840 3,948 4,032 4,230 4,480 4,512 4,935 5,040 5,264 5,376 5,640 5,760 5,922 6,016 6,580 6,720 6,768 7,520 7,896 8,064 8,460 8,960 9,024 9,870 10,080 10,528 11,280 11,520 11,844 12,032 13,160 13,440 13,536 14,805 15,040 15,792 16,128 16,920 18,048 19,740 20,160 21,056 22,560 23,688 26,320 26,880 27,072 29,610 30,080 31,584 33,840 36,096 39,480 40,320 42,112 45,120 47,376 52,640 54,144 59,220 60,160 63,168 67,680 78,960 80,640 84,224 90,240 94,752 105,280 108,288 118,440 126,336 135,360 157,920 180,480 189,504 210,560 236,880 252,672 270,720 315,840 379,008 421,120 473,760 541,440 631,680 758,016 947,520 1,263,360 1,895,040 and 3,790,080, with no remainder.
Since 3,790,080 cannot be divided by just 1 and 3,790,080, it is not a prime number.