A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4348032 can be evenly divided by 1 2 3 4 6 8 12 13 16 24 26 32 39 48 52 64 67 78 96 104 128 134 156 169 192 201 208 268 312 338 384 402 416 507 536 624 676 804 832 871 1,014 1,072 1,248 1,352 1,608 1,664 1,742 2,028 2,144 2,496 2,613 2,704 3,216 3,484 4,056 4,288 4,992 5,226 5,408 6,432 6,968 8,112 8,576 10,452 10,816 11,323 12,864 13,936 16,224 20,904 21,632 22,646 25,728 27,872 32,448 33,969 41,808 45,292 55,744 64,896 67,938 83,616 90,584 111,488 135,876 167,232 181,168 271,752 334,464 362,336 543,504 724,672 1,087,008 1,449,344 2,174,016 and 4,348,032, with no remainder.
Since 4,348,032 cannot be divided by just 1 and 4,348,032, it is not a prime number.