The number 3,304,840 can be evenly divided by 1 2 4 5 7 8 10 11 14 20 22 28 29 35 37 40 44 55 56 58 70 74 77 88 110 116 140 145 148 154 185 203 220 232 259 280 290 296 308 319 370 385 406 407 440 518 580 616 638 740 770 812 814 1,015 1,036 1,073 1,160 1,276 1,295 1,480 1,540 1,595 1,624 1,628 2,030 2,035 2,072 2,146 2,233 2,552 2,590 2,849 3,080 3,190 3,256 4,060 4,070 4,292 4,466 5,180 5,365 5,698 6,380 7,511 8,120 8,140 8,584 8,932 10,360 10,730 11,165 11,396 11,803 12,760 14,245 15,022 16,280 17,864 21,460 22,330 22,792 23,606 28,490 30,044 37,555 42,920 44,660 47,212 56,980 59,015 60,088 75,110 82,621 89,320 94,424 113,960 118,030 150,220 165,242 236,060 300,440 330,484 413,105 472,120 660,968 826,210 1,652,420 and 3,304,840, with no remainder.
Since 3,304,840 cannot be divided by just 1 and 3,304,840, it is a composite number.