The number 7,926,828 can be evenly divided by 1 2 3 4 6 7 12 13 14 17 21 26 28 34 39 42 49 51 52 61 68 78 84 91 98 102 119 122 147 156 182 183 196 204 221 238 244 273 294 357 364 366 427 442 476 546 588 637 663 714 732 793 833 854 884 1,037 1,092 1,274 1,281 1,326 1,428 1,547 1,586 1,666 1,708 1,911 2,074 2,379 2,499 2,548 2,562 2,652 2,989 3,094 3,111 3,172 3,332 3,822 4,148 4,641 4,758 4,998 5,124 5,551 5,978 6,188 6,222 7,259 7,644 8,967 9,282 9,516 9,996 10,829 11,102 11,956 12,444 13,481 14,518 16,653 17,934 18,564 21,658 21,777 22,204 26,962 29,036 32,487 33,306 35,868 38,857 40,443 43,316 43,554 50,813 53,924 64,974 66,612 77,714 80,886 87,108 94,367 101,626 116,571 129,948 152,439 155,428 161,772 188,734 203,252 233,142 283,101 304,878 377,468 466,284 566,202 609,756 660,569 1,132,404 1,321,138 1,981,707 2,642,276 3,963,414 and 7,926,828, with no remainder.
Since 7,926,828 cannot be divided by just 1 and 7,926,828, it is a composite number.