The number 8,009,820 can be evenly divided by 1 2 3 4 5 6 7 9 10 12 13 14 15 18 20 21 26 27 28 30 35 36 39 42 45 52 54 60 63 65 70 78 84 90 91 105 108 117 126 130 135 140 156 163 180 182 189 195 210 234 252 260 270 273 315 326 351 364 378 390 420 455 468 489 540 546 585 630 652 702 756 780 815 819 910 945 978 1,092 1,141 1,170 1,260 1,365 1,404 1,467 1,630 1,638 1,755 1,820 1,890 1,956 2,119 2,282 2,340 2,445 2,457 2,730 2,934 3,260 3,276 3,423 3,510 3,780 4,095 4,238 4,401 4,564 4,890 4,914 5,460 5,705 5,868 6,357 6,846 7,020 7,335 8,190 8,476 8,802 9,780 9,828 10,269 10,595 11,410 12,285 12,714 13,692 14,670 14,833 16,380 17,115 17,604 19,071 20,538 21,190 22,005 22,820 24,570 25,428 29,340 29,666 30,807 31,785 34,230 38,142 41,076 42,380 44,010 44,499 49,140 51,345 57,213 59,332 61,614 63,570 68,460 74,165 76,284 88,020 88,998 95,355 102,690 114,426 123,228 127,140 133,497 148,330 154,035 177,996 190,710 205,380 222,495 228,852 266,994 286,065 296,660 308,070 381,420 400,491 444,990 533,988 572,130 616,140 667,485 800,982 889,980 1,144,260 1,334,970 1,601,964 2,002,455 2,669,940 4,004,910 and 8,009,820, with no remainder.
Since 8,009,820 cannot be divided by just 1 and 8,009,820, it is a composite number.