The number 4,000,320 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 64 72 80 90 96 108 120 135 144 160 180 192 216 240 270 288 320 360 432 463 480 540 576 720 864 926 960 1,080 1,389 1,440 1,728 1,852 2,160 2,315 2,778 2,880 3,704 4,167 4,320 4,630 5,556 6,945 7,408 8,334 8,640 9,260 11,112 12,501 13,890 14,816 16,668 18,520 20,835 22,224 25,002 27,780 29,632 33,336 37,040 41,670 44,448 50,004 55,560 62,505 66,672 74,080 83,340 88,896 100,008 111,120 125,010 133,344 148,160 166,680 200,016 222,240 250,020 266,688 333,360 400,032 444,480 500,040 666,720 800,064 1,000,080 1,333,440 2,000,160 and 4,000,320, with no remainder.
Since 4,000,320 cannot be divided by just 1 and 4,000,320, it is a composite number.