The number 3,855,720 can be evenly divided by 1 2 3 4 5 6 8 10 11 12 15 20 22 23 24 30 33 40 44 46 55 60 66 69 88 92 110 115 120 127 132 138 165 184 220 230 253 254 264 276 330 345 381 440 460 506 508 552 635 660 690 759 762 920 1,012 1,016 1,265 1,270 1,320 1,380 1,397 1,518 1,524 1,905 2,024 2,530 2,540 2,760 2,794 2,921 3,036 3,048 3,795 3,810 4,191 5,060 5,080 5,588 5,842 6,072 6,985 7,590 7,620 8,382 8,763 10,120 11,176 11,684 13,970 14,605 15,180 15,240 16,764 17,526 20,955 23,368 27,940 29,210 30,360 32,131 33,528 35,052 41,910 43,815 55,880 58,420 64,262 70,104 83,820 87,630 96,393 116,840 128,524 160,655 167,640 175,260 192,786 257,048 321,310 350,520 385,572 481,965 642,620 771,144 963,930 1,285,240 1,927,860 and 3,855,720, with no remainder.
Since 3,855,720 cannot be divided by just 1 and 3,855,720, it is a composite number.