The number 7,790,328 can be evenly divided by 1 2 3 4 6 7 8 9 12 13 14 18 21 24 26 28 29 36 39 41 42 52 56 58 63 72 78 82 84 87 91 104 116 117 123 126 156 164 168 174 182 203 232 234 246 252 261 273 287 312 328 348 364 369 377 406 468 492 504 522 533 546 574 609 696 728 738 754 812 819 861 936 984 1,044 1,066 1,092 1,131 1,148 1,189 1,218 1,476 1,508 1,599 1,624 1,638 1,722 1,827 2,088 2,132 2,184 2,262 2,296 2,378 2,436 2,583 2,639 2,952 3,016 3,198 3,276 3,393 3,444 3,567 3,654 3,731 4,264 4,524 4,756 4,797 4,872 5,166 5,278 6,396 6,552 6,786 6,888 7,134 7,308 7,462 7,917 8,323 9,048 9,512 9,594 10,332 10,556 10,701 11,193 12,792 13,572 14,268 14,616 14,924 15,457 15,834 16,646 19,188 20,664 21,112 21,402 22,386 23,751 24,969 27,144 28,536 29,848 30,914 31,668 33,292 33,579 38,376 42,804 44,772 46,371 47,502 49,938 61,828 63,336 66,584 67,158 74,907 85,608 89,544 92,742 95,004 99,876 108,199 123,656 134,316 139,113 149,814 185,484 190,008 199,752 216,398 268,632 278,226 299,628 324,597 370,968 432,796 556,452 599,256 649,194 865,592 973,791 1,112,904 1,298,388 1,947,582 2,596,776 3,895,164 and 7,790,328, with no remainder.
Since 7,790,328 cannot be divided by just 1 and 7,790,328, it is a composite number.