The number 2,624,622 can be evenly divided by 1 2 3 6 7 11 13 14 19 21 22 23 26 33 38 39 42 46 57 66 69 77 78 91 114 133 138 143 154 161 182 209 231 247 253 266 273 286 299 322 399 418 429 437 462 483 494 506 546 598 627 741 759 798 858 874 897 966 1,001 1,254 1,311 1,463 1,482 1,518 1,729 1,771 1,794 2,002 2,093 2,622 2,717 2,926 3,003 3,059 3,289 3,458 3,542 4,186 4,389 4,807 5,187 5,313 5,434 5,681 6,006 6,118 6,279 6,578 8,151 8,778 9,177 9,614 9,867 10,374 10,626 11,362 12,558 14,421 16,302 17,043 18,354 19,019 19,734 23,023 28,842 33,649 34,086 38,038 39,767 46,046 57,057 62,491 67,298 69,069 79,534 100,947 114,114 119,301 124,982 138,138 187,473 201,894 238,602 374,946 437,437 874,874 1,312,311 and 2,624,622, with no remainder.
Since 2,624,622 cannot be divided by just 1 and 2,624,622, it is a composite number.