The number 3,547,320 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 41 42 56 60 70 82 84 103 105 120 123 140 164 168 205 206 210 246 280 287 309 328 410 412 420 492 515 574 615 618 721 820 824 840 861 984 1,030 1,148 1,230 1,236 1,435 1,442 1,545 1,640 1,722 2,060 2,163 2,296 2,460 2,472 2,870 2,884 3,090 3,444 3,605 4,120 4,223 4,305 4,326 4,920 5,740 5,768 6,180 6,888 7,210 8,446 8,610 8,652 10,815 11,480 12,360 12,669 14,420 16,892 17,220 17,304 21,115 21,630 25,338 28,840 29,561 33,784 34,440 42,230 43,260 50,676 59,122 63,345 84,460 86,520 88,683 101,352 118,244 126,690 147,805 168,920 177,366 236,488 253,380 295,610 354,732 443,415 506,760 591,220 709,464 886,830 1,182,440 1,773,660 and 3,547,320, with no remainder.
Since 3,547,320 cannot be divided by just 1 and 3,547,320, it is a composite number.