The number 3,535,840 can be evenly divided by 1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 41 44 49 55 56 70 77 80 82 88 98 110 112 140 154 160 164 176 196 205 220 224 245 280 287 308 328 352 385 392 410 440 451 490 539 560 574 616 656 770 784 820 880 902 980 1,078 1,120 1,148 1,232 1,312 1,435 1,540 1,568 1,640 1,760 1,804 1,960 2,009 2,156 2,255 2,296 2,464 2,695 2,870 3,080 3,157 3,280 3,608 3,920 4,018 4,312 4,510 4,592 5,390 5,740 6,160 6,314 6,560 7,216 7,840 8,036 8,624 9,020 9,184 10,045 10,780 11,480 12,320 12,628 14,432 15,785 16,072 17,248 18,040 20,090 21,560 22,099 22,960 25,256 31,570 32,144 36,080 40,180 43,120 44,198 45,920 50,512 63,140 64,288 72,160 80,360 86,240 88,396 101,024 110,495 126,280 160,720 176,792 220,990 252,560 321,440 353,584 441,980 505,120 707,168 883,960 1,767,920 and 3,535,840, with no remainder.
Since 3,535,840 cannot be divided by just 1 and 3,535,840, it is a composite number.