The number 2,490,840 can be evenly divided by 1 2 3 4 5 6 8 9 10 11 12 15 17 18 20 22 24 30 33 34 36 37 40 44 45 51 55 60 66 68 72 74 85 88 90 99 102 110 111 120 132 136 148 153 165 170 180 185 187 198 204 220 222 255 264 296 306 330 333 340 360 370 374 396 407 408 440 444 495 510 555 561 612 629 660 666 680 740 748 765 792 814 888 935 990 1,020 1,110 1,122 1,221 1,224 1,258 1,320 1,332 1,480 1,496 1,530 1,628 1,665 1,683 1,870 1,887 1,980 2,035 2,040 2,220 2,244 2,442 2,516 2,664 2,805 3,060 3,145 3,256 3,330 3,366 3,663 3,740 3,774 3,960 4,070 4,440 4,488 4,884 5,032 5,610 5,661 6,105 6,120 6,290 6,660 6,732 6,919 7,326 7,480 7,548 8,140 8,415 9,435 9,768 11,220 11,322 12,210 12,580 13,320 13,464 13,838 14,652 15,096 16,280 16,830 18,315 18,870 20,757 22,440 22,644 24,420 25,160 27,676 28,305 29,304 33,660 34,595 36,630 37,740 41,514 45,288 48,840 55,352 56,610 62,271 67,320 69,190 73,260 75,480 83,028 103,785 113,220 124,542 138,380 146,520 166,056 207,570 226,440 249,084 276,760 311,355 415,140 498,168 622,710 830,280 1,245,420 and 2,490,840, with no remainder.
Since 2,490,840 cannot be divided by just 1 and 2,490,840, it is a composite number.