The number 2,990,880 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 30 31 32 36 40 45 48 60 62 67 72 80 90 93 96 120 124 134 144 155 160 180 186 201 240 248 268 279 288 310 335 360 372 402 465 480 496 536 558 603 620 670 720 744 804 930 992 1,005 1,072 1,116 1,206 1,240 1,340 1,395 1,440 1,488 1,608 1,860 2,010 2,077 2,144 2,232 2,412 2,480 2,680 2,790 2,976 3,015 3,216 3,720 4,020 4,154 4,464 4,824 4,960 5,360 5,580 6,030 6,231 6,432 7,440 8,040 8,308 8,928 9,648 10,385 10,720 11,160 12,060 12,462 14,880 16,080 16,616 18,693 19,296 20,770 22,320 24,120 24,924 31,155 32,160 33,232 37,386 41,540 44,640 48,240 49,848 62,310 66,464 74,772 83,080 93,465 96,480 99,696 124,620 149,544 166,160 186,930 199,392 249,240 299,088 332,320 373,860 498,480 598,176 747,720 996,960 1,495,440 and 2,990,880, with no remainder.
Since 2,990,880 cannot be divided by just 1 and 2,990,880, it is a composite number.