A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 5746884 can be evenly divided by 1 2 3 4 6 11 12 13 17 22 26 33 34 39 44 51 52 66 68 78 102 132 143 156 187 197 204 221 286 374 394 429 442 561 572 591 663 748 788 858 884 1,122 1,182 1,326 1,716 2,167 2,244 2,364 2,431 2,561 2,652 3,349 4,334 4,862 5,122 6,501 6,698 7,293 7,683 8,668 9,724 10,047 10,244 13,002 13,396 14,586 15,366 20,094 26,004 28,171 29,172 30,732 36,839 40,188 43,537 56,342 73,678 84,513 87,074 110,517 112,684 130,611 147,356 169,026 174,148 221,034 261,222 338,052 442,068 478,907 522,444 957,814 1,436,721 1,915,628 2,873,442 and 5,746,884, with no remainder.
Since 5,746,884 cannot be divided by just 1 and 5,746,884, it is not a prime number.