The number 5,339,880 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 20 21 24 26 28 30 35 36 39 40 42 45 52 56 60 63 65 70 72 78 84 90 91 104 105 117 120 126 130 140 156 163 168 180 182 195 210 234 252 260 273 280 312 315 326 360 364 390 420 455 468 489 504 520 546 585 630 652 728 780 815 819 840 910 936 978 1,092 1,141 1,170 1,260 1,304 1,365 1,467 1,560 1,630 1,638 1,820 1,956 2,119 2,184 2,282 2,340 2,445 2,520 2,730 2,934 3,260 3,276 3,423 3,640 3,912 4,095 4,238 4,564 4,680 4,890 5,460 5,705 5,868 6,357 6,520 6,552 6,846 7,335 8,190 8,476 9,128 9,780 10,269 10,595 10,920 11,410 11,736 12,714 13,692 14,670 14,833 16,380 16,952 17,115 19,071 19,560 20,538 21,190 22,820 25,428 27,384 29,340 29,666 31,785 32,760 34,230 38,142 41,076 42,380 44,499 45,640 50,856 51,345 58,680 59,332 63,570 68,460 74,165 76,284 82,152 84,760 88,998 95,355 102,690 118,664 127,140 133,497 136,920 148,330 152,568 177,996 190,710 205,380 222,495 254,280 266,994 296,660 355,992 381,420 410,760 444,990 533,988 593,320 667,485 762,840 889,980 1,067,976 1,334,970 1,779,960 2,669,940 and 5,339,880, with no remainder.
Since 5,339,880 cannot be divided by just 1 and 5,339,880, it is a composite number.