The number 8,972,640 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 31 32 36 40 45 48 54 60 62 67 72 80 90 93 96 108 120 124 134 135 144 155 160 180 186 201 216 240 248 268 270 279 288 310 335 360 372 402 432 465 480 496 536 540 558 603 620 670 720 744 804 837 864 930 992 1,005 1,072 1,080 1,116 1,206 1,240 1,340 1,395 1,440 1,488 1,608 1,674 1,809 1,860 2,010 2,077 2,144 2,160 2,232 2,412 2,480 2,680 2,790 2,976 3,015 3,216 3,348 3,618 3,720 4,020 4,154 4,185 4,320 4,464 4,824 4,960 5,360 5,580 6,030 6,231 6,432 6,696 7,236 7,440 8,040 8,308 8,370 8,928 9,045 9,648 10,385 10,720 11,160 12,060 12,462 13,392 14,472 14,880 16,080 16,616 16,740 18,090 18,693 19,296 20,770 22,320 24,120 24,924 26,784 28,944 31,155 32,160 33,232 33,480 36,180 37,386 41,540 44,640 48,240 49,848 56,079 57,888 62,310 66,464 66,960 72,360 74,772 83,080 93,465 96,480 99,696 112,158 124,620 133,920 144,720 149,544 166,160 186,930 199,392 224,316 249,240 280,395 289,440 299,088 332,320 373,860 448,632 498,480 560,790 598,176 747,720 897,264 996,960 1,121,580 1,495,440 1,794,528 2,243,160 2,990,880 4,486,320 and 8,972,640, with no remainder.
Since 8,972,640 cannot be divided by just 1 and 8,972,640, it is a composite number.