A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2092896 can be evenly divided by 1 2 3 4 6 8 9 12 13 16 18 24 26 32 36 39 43 48 52 72 78 86 96 104 117 129 144 156 169 172 208 234 258 288 312 338 344 387 416 468 507 516 559 624 676 688 774 936 1,014 1,032 1,118 1,248 1,352 1,376 1,521 1,548 1,677 1,872 2,028 2,064 2,236 2,704 3,042 3,096 3,354 3,744 4,056 4,128 4,472 5,031 5,408 6,084 6,192 6,708 7,267 8,112 8,944 10,062 12,168 12,384 13,416 14,534 16,224 17,888 20,124 21,801 24,336 26,832 29,068 40,248 43,602 48,672 53,664 58,136 65,403 80,496 87,204 116,272 130,806 160,992 174,408 232,544 261,612 348,816 523,224 697,632 1,046,448 and 2,092,896, with no remainder.
Since 2,092,896 cannot be divided by just 1 and 2,092,896, it is not a prime number.