The number 2,511,040 can be evenly divided by 1 2 4 5 7 8 10 14 16 19 20 28 32 35 38 40 56 59 64 70 76 80 95 112 118 133 140 152 160 190 224 236 266 280 295 304 320 380 413 448 472 532 560 590 608 665 760 826 944 1,064 1,120 1,121 1,180 1,216 1,330 1,520 1,652 1,888 2,065 2,128 2,240 2,242 2,360 2,660 3,040 3,304 3,776 4,130 4,256 4,484 4,720 5,320 5,605 6,080 6,608 7,847 8,260 8,512 8,968 9,440 10,640 11,210 13,216 15,694 16,520 17,936 18,880 21,280 22,420 26,432 31,388 33,040 35,872 39,235 42,560 44,840 62,776 66,080 71,744 78,470 89,680 125,552 132,160 156,940 179,360 251,104 313,880 358,720 502,208 627,760 1,255,520 and 2,511,040, with no remainder.
Since 2,511,040 cannot be divided by just 1 and 2,511,040, it is a composite number.