The number 3,737,280 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 17 20 24 30 32 34 40 48 51 60 64 68 80 85 96 102 120 136 160 170 192 204 229 240 255 272 320 340 408 458 480 510 544 680 687 816 916 960 1,020 1,088 1,145 1,360 1,374 1,632 1,832 2,040 2,290 2,720 2,748 3,264 3,435 3,664 3,893 4,080 4,580 5,440 5,496 6,870 7,328 7,786 8,160 9,160 10,992 11,679 13,740 14,656 15,572 16,320 18,320 19,465 21,984 23,358 27,480 31,144 36,640 38,930 43,968 46,716 54,960 58,395 62,288 73,280 77,860 93,432 109,920 116,790 124,576 155,720 186,864 219,840 233,580 249,152 311,440 373,728 467,160 622,880 747,456 934,320 1,245,760 1,868,640 and 3,737,280, with no remainder.
Since 3,737,280 cannot be divided by just 1 and 3,737,280, it is a composite number.