The number 3,404,310 can be evenly divided by 1 2 3 5 6 7 10 13 14 15 21 26 29 30 35 39 42 43 58 65 70 78 86 87 91 105 129 130 145 174 182 195 203 210 215 258 273 290 301 377 390 406 430 435 455 546 559 602 609 645 754 870 903 910 1,015 1,118 1,131 1,218 1,247 1,290 1,365 1,505 1,677 1,806 1,885 2,030 2,262 2,494 2,639 2,730 2,795 3,010 3,045 3,354 3,741 3,770 3,913 4,515 5,278 5,590 5,655 6,090 6,235 7,482 7,826 7,917 8,385 8,729 9,030 11,310 11,739 12,470 13,195 15,834 16,211 16,770 17,458 18,705 19,565 23,478 26,187 26,390 32,422 37,410 39,130 39,585 43,645 48,633 52,374 58,695 79,170 81,055 87,290 97,266 113,477 117,390 130,935 162,110 226,954 243,165 261,870 340,431 486,330 567,385 680,862 1,134,770 1,702,155 and 3,404,310, with no remainder.
Since 3,404,310 cannot be divided by just 1 and 3,404,310, it is a composite number.