A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3462368 can be evenly divided by 1 2 4 7 8 13 14 16 26 28 29 32 41 52 56 58 82 91 104 112 116 164 182 203 208 224 232 287 328 364 377 406 416 464 533 574 656 728 754 812 928 1,066 1,148 1,189 1,312 1,456 1,508 1,624 2,132 2,296 2,378 2,639 2,912 3,016 3,248 3,731 4,264 4,592 4,756 5,278 6,032 6,496 7,462 8,323 8,528 9,184 9,512 10,556 12,064 14,924 15,457 16,646 17,056 19,024 21,112 29,848 30,914 33,292 38,048 42,224 59,696 61,828 66,584 84,448 108,199 119,392 123,656 133,168 216,398 247,312 266,336 432,796 494,624 865,592 1,731,184 and 3,462,368, with no remainder.
Since 3,462,368 cannot be divided by just 1 and 3,462,368, it is not a prime number.