The number 3,937,472 can be evenly divided by 1 2 4 7 8 11 14 16 17 22 28 32 34 44 47 56 64 68 77 88 94 112 119 136 154 176 187 188 224 238 272 308 329 352 374 376 448 476 517 544 616 658 704 748 752 799 952 1,034 1,088 1,232 1,309 1,316 1,496 1,504 1,598 1,904 2,068 2,464 2,618 2,632 2,992 3,008 3,196 3,619 3,808 4,136 4,928 5,236 5,264 5,593 5,984 6,392 7,238 7,616 8,272 8,789 10,472 10,528 11,186 11,968 12,784 14,476 16,544 17,578 20,944 21,056 22,372 25,568 28,952 33,088 35,156 41,888 44,744 51,136 57,904 61,523 70,312 83,776 89,488 115,808 123,046 140,624 178,976 231,616 246,092 281,248 357,952 492,184 562,496 984,368 1,968,736 and 3,937,472, with no remainder.
Since 3,937,472 cannot be divided by just 1 and 3,937,472, it is a composite number.