A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2752704 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 59 64 72 81 96 108 118 144 162 177 192 216 236 243 288 324 354 432 472 486 531 576 648 708 729 864 944 972 1,062 1,296 1,416 1,458 1,593 1,728 1,888 1,944 2,124 2,592 2,832 2,916 3,186 3,776 3,888 4,248 4,779 5,184 5,664 5,832 6,372 7,776 8,496 9,558 11,328 11,664 12,744 14,337 15,552 16,992 19,116 23,328 25,488 28,674 33,984 38,232 43,011 46,656 50,976 57,348 76,464 86,022 101,952 114,696 152,928 172,044 229,392 305,856 344,088 458,784 688,176 917,568 1,376,352 and 2,752,704, with no remainder.
Since 2,752,704 cannot be divided by just 1 and 2,752,704, it is not a prime number.