A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 8335488 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 24 28 32 42 48 49 56 64 84 96 98 112 128 147 168 192 196 224 294 336 384 392 443 448 588 672 784 886 896 1,176 1,329 1,344 1,568 1,772 2,352 2,658 2,688 3,101 3,136 3,544 4,704 5,316 6,202 6,272 7,088 9,303 9,408 10,632 12,404 14,176 18,606 18,816 21,264 21,707 24,808 28,352 37,212 42,528 43,414 49,616 56,704 65,121 74,424 85,056 86,828 99,232 130,242 148,848 170,112 173,656 198,464 260,484 297,696 347,312 396,928 520,968 595,392 694,624 1,041,936 1,190,784 1,389,248 2,083,872 2,778,496 4,167,744 and 8,335,488, with no remainder.
Since 8,335,488 cannot be divided by just 1 and 8,335,488, it is not a prime number.