A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4889304 can be evenly divided by 1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 42 56 63 72 84 89 109 126 168 178 218 252 267 327 356 436 504 534 623 654 712 763 801 872 981 1,068 1,246 1,308 1,526 1,602 1,869 1,962 2,136 2,289 2,492 2,616 3,052 3,204 3,738 3,924 4,578 4,984 5,607 6,104 6,408 6,867 7,476 7,848 9,156 9,701 11,214 13,734 14,952 18,312 19,402 22,428 27,468 29,103 38,804 44,856 54,936 58,206 67,907 77,608 87,309 116,412 135,814 174,618 203,721 232,824 271,628 349,236 407,442 543,256 611,163 698,472 814,884 1,222,326 1,629,768 2,444,652 and 4,889,304, with no remainder.
Since 4,889,304 cannot be divided by just 1 and 4,889,304, it is not a prime number.