The number 5,256,888 can be evenly divided by 1 2 3 4 6 7 8 12 13 14 21 24 26 28 29 39 42 52 56 58 78 83 84 87 91 104 116 156 166 168 174 182 203 232 249 273 312 332 348 364 377 406 498 546 581 609 664 696 728 754 812 996 1,079 1,092 1,131 1,162 1,218 1,508 1,624 1,743 1,992 2,158 2,184 2,262 2,324 2,407 2,436 2,639 3,016 3,237 3,486 4,316 4,524 4,648 4,814 4,872 5,278 6,474 6,972 7,221 7,553 7,917 8,632 9,048 9,628 10,556 12,948 13,944 14,442 15,106 15,834 16,849 19,256 21,112 22,659 25,896 28,884 30,212 31,291 31,668 33,698 45,318 50,547 57,768 60,424 62,582 63,336 67,396 90,636 93,873 101,094 125,164 134,792 181,272 187,746 202,188 219,037 250,328 375,492 404,376 438,074 657,111 750,984 876,148 1,314,222 1,752,296 2,628,444 and 5,256,888, with no remainder.
Since 5,256,888 cannot be divided by just 1 and 5,256,888, it is a composite number.