A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8887824 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 31 33 36 44 48 62 66 72 88 93 99 124 132 144 176 181 186 198 248 264 279 341 362 372 396 496 528 543 558 682 724 744 792 1,023 1,086 1,116 1,364 1,448 1,488 1,584 1,629 1,991 2,046 2,172 2,232 2,728 2,896 3,069 3,258 3,982 4,092 4,344 4,464 5,456 5,611 5,973 6,138 6,516 7,964 8,184 8,688 11,222 11,946 12,276 13,032 15,928 16,368 16,833 17,919 22,444 23,892 24,552 26,064 31,856 33,666 35,838 44,888 47,784 49,104 50,499 61,721 67,332 71,676 89,776 95,568 100,998 123,442 134,664 143,352 185,163 201,996 246,884 269,328 286,704 370,326 403,992 493,768 555,489 740,652 807,984 987,536 1,110,978 1,481,304 2,221,956 2,962,608 4,443,912 and 8,887,824, with no remainder.
Since 8,887,824 cannot be divided by just 1 and 8,887,824, it is not a prime number.