A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3449952 can be evenly divided by 1 2 3 4 6 8 9 11 12 16 18 22 24 27 32 33 36 44 48 54 66 72 81 88 96 99 108 121 132 144 162 176 198 216 242 264 288 297 324 352 363 396 432 484 528 594 648 726 792 864 891 968 1,056 1,089 1,188 1,296 1,331 1,452 1,584 1,782 1,936 2,178 2,376 2,592 2,662 2,904 3,168 3,267 3,564 3,872 3,993 4,356 4,752 5,324 5,808 6,534 7,128 7,986 8,712 9,504 9,801 10,648 11,616 11,979 13,068 14,256 15,972 17,424 19,602 21,296 23,958 26,136 28,512 31,944 34,848 35,937 39,204 42,592 47,916 52,272 63,888 71,874 78,408 95,832 104,544 107,811 127,776 143,748 156,816 191,664 215,622 287,496 313,632 383,328 431,244 574,992 862,488 1,149,984 1,724,976 and 3,449,952, with no remainder.
Since 3,449,952 cannot be divided by just 1 and 3,449,952, it is not a prime number.