The number 7,736,904 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 17 18 21 24 27 28 34 36 42 43 49 51 54 56 63 68 72 84 86 98 102 108 119 126 129 136 147 153 168 172 189 196 204 216 238 252 258 294 301 306 344 357 378 387 392 408 441 459 476 504 516 588 602 612 714 731 756 774 833 882 903 918 952 1,032 1,071 1,161 1,176 1,204 1,224 1,323 1,428 1,462 1,512 1,548 1,666 1,764 1,806 1,836 2,107 2,142 2,193 2,322 2,408 2,499 2,646 2,709 2,856 2,924 3,096 3,213 3,332 3,528 3,612 3,672 4,214 4,284 4,386 4,644 4,998 5,117 5,292 5,418 5,848 6,321 6,426 6,579 6,664 7,224 7,497 8,127 8,428 8,568 8,772 9,288 9,996 10,234 10,584 10,836 12,642 12,852 13,158 14,994 15,351 16,254 16,856 17,544 18,963 19,737 19,992 20,468 21,672 22,491 25,284 25,704 26,316 29,988 30,702 32,508 35,819 37,926 39,474 40,936 44,982 46,053 50,568 52,632 56,889 59,976 61,404 65,016 71,638 75,852 78,948 89,964 92,106 107,457 113,778 122,808 138,159 143,276 151,704 157,896 179,928 184,212 214,914 227,556 276,318 286,552 322,371 368,424 429,828 455,112 552,636 644,742 859,656 967,113 1,105,272 1,289,484 1,934,226 2,578,968 3,868,452 and 7,736,904, with no remainder.
Since 7,736,904 cannot be divided by just 1 and 7,736,904, it is a composite number.