The number 906,984 can be evenly divided by 1 2 3 4 6 8 9 12 13 17 18 19 24 26 27 34 36 38 39 51 52 54 57 68 72 76 78 102 104 108 114 117 136 152 153 156 171 204 216 221 228 234 247 306 312 323 342 351 408 442 456 459 468 494 513 612 646 663 684 702 741 884 918 936 969 988 1,026 1,224 1,292 1,326 1,368 1,404 1,482 1,768 1,836 1,938 1,976 1,989 2,052 2,223 2,584 2,652 2,808 2,907 2,964 3,672 3,876 3,978 4,104 4,199 4,446 5,304 5,814 5,928 5,967 6,669 7,752 7,956 8,398 8,721 8,892 11,628 11,934 12,597 13,338 15,912 16,796 17,442 17,784 23,256 23,868 25,194 26,676 33,592 34,884 37,791 47,736 50,388 53,352 69,768 75,582 100,776 113,373 151,164 226,746 302,328 453,492 and 906,984, with no remainder.
Since 906,984 cannot be divided by just 1 and 906,984, it is a composite number.