The number 7,680,420 can be evenly divided by 1 2 3 4 5 6 9 10 11 12 15 18 20 22 27 30 33 36 44 45 54 55 60 66 81 90 99 108 110 132 135 162 165 180 198 220 270 297 324 330 396 405 431 495 540 594 660 810 862 891 990 1,188 1,293 1,485 1,620 1,724 1,782 1,980 2,155 2,586 2,970 3,564 3,879 4,310 4,455 4,741 5,172 5,940 6,465 7,758 8,620 8,910 9,482 11,637 12,930 14,223 15,516 17,820 18,964 19,395 23,274 23,705 25,860 28,446 34,911 38,790 42,669 46,548 47,410 56,892 58,185 69,822 71,115 77,580 85,338 94,820 116,370 128,007 139,644 142,230 170,676 174,555 213,345 232,740 256,014 284,460 349,110 384,021 426,690 512,028 640,035 698,220 768,042 853,380 1,280,070 1,536,084 1,920,105 2,560,140 3,840,210 and 7,680,420, with no remainder.
Since 7,680,420 cannot be divided by just 1 and 7,680,420, it is a composite number.