The number 3,731,200 can be evenly divided by 1 2 4 5 8 10 11 16 20 22 25 32 40 44 50 53 55 64 80 88 100 106 110 128 160 176 200 212 220 256 265 275 320 352 400 424 440 530 550 583 640 704 800 848 880 1,060 1,100 1,166 1,280 1,325 1,408 1,600 1,696 1,760 2,120 2,200 2,332 2,650 2,816 2,915 3,200 3,392 3,520 4,240 4,400 4,664 5,300 5,830 6,400 6,784 7,040 8,480 8,800 9,328 10,600 11,660 13,568 14,080 14,575 16,960 17,600 18,656 21,200 23,320 29,150 33,920 35,200 37,312 42,400 46,640 58,300 67,840 70,400 74,624 84,800 93,280 116,600 149,248 169,600 186,560 233,200 339,200 373,120 466,400 746,240 932,800 1,865,600 and 3,731,200, with no remainder.
Since 3,731,200 cannot be divided by just 1 and 3,731,200, it is a composite number.