A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4189680 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 23 24 30 33 36 40 44 45 46 48 55 60 66 69 72 80 88 90 92 99 110 115 120 132 138 144 165 176 180 184 198 207 220 230 240 253 264 276 330 345 360 368 396 414 440 460 495 506 528 529 552 660 690 720 759 792 828 880 920 990 1,012 1,035 1,058 1,104 1,265 1,320 1,380 1,518 1,584 1,587 1,656 1,840 1,980 2,024 2,070 2,116 2,277 2,530 2,640 2,645 2,760 3,036 3,174 3,312 3,795 3,960 4,048 4,140 4,232 4,554 4,761 5,060 5,290 5,520 5,819 6,072 6,348 7,590 7,920 7,935 8,280 8,464 9,108 9,522 10,120 10,580 11,385 11,638 12,144 12,696 15,180 15,870 16,560 17,457 18,216 19,044 20,240 21,160 22,770 23,276 23,805 25,392 29,095 30,360 31,740 34,914 36,432 38,088 42,320 45,540 46,552 47,610 52,371 58,190 60,720 63,480 69,828 76,176 87,285 91,080 93,104 95,220 104,742 116,380 126,960 139,656 174,570 182,160 190,440 209,484 232,760 261,855 279,312 349,140 380,880 418,968 465,520 523,710 698,280 837,936 1,047,420 1,396,560 2,094,840 and 4,189,680, with no remainder.
Since 4,189,680 cannot be divided by just 1 and 4,189,680, it is not a prime number.