The number 4,338,880 can be evenly divided by 1 2 4 5 7 8 10 13 14 16 20 26 28 32 35 40 52 56 64 65 70 80 91 104 112 130 140 149 160 182 208 224 260 280 298 320 364 416 448 455 520 560 596 728 745 832 910 1,040 1,043 1,120 1,192 1,456 1,490 1,820 1,937 2,080 2,086 2,240 2,384 2,912 2,980 3,640 3,874 4,160 4,172 4,768 5,215 5,824 5,960 7,280 7,748 8,344 9,536 9,685 10,430 11,920 13,559 14,560 15,496 16,688 19,370 20,860 23,840 27,118 29,120 30,992 33,376 38,740 41,720 47,680 54,236 61,984 66,752 67,795 77,480 83,440 108,472 123,968 135,590 154,960 166,880 216,944 271,180 309,920 333,760 433,888 542,360 619,840 867,776 1,084,720 2,169,440 and 4,338,880, with no remainder.
Since 4,338,880 cannot be divided by just 1 and 4,338,880, it is a composite number.