A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2694384 can be evenly divided by 1 2 3 4 6 7 8 9 11 12 14 16 18 21 22 24 27 28 33 36 42 44 48 54 56 63 66 72 77 81 84 88 99 108 112 126 132 144 154 162 168 176 189 198 216 231 243 252 264 297 308 324 336 378 396 432 462 486 504 528 567 594 616 648 693 729 756 792 891 924 972 1,008 1,134 1,188 1,232 1,296 1,386 1,458 1,512 1,584 1,701 1,782 1,848 1,944 2,079 2,187 2,268 2,376 2,673 2,772 2,916 3,024 3,402 3,564 3,696 3,888 4,158 4,374 4,536 4,752 5,103 5,346 5,544 5,832 6,237 6,804 7,128 8,019 8,316 8,748 9,072 10,206 10,692 11,088 11,664 12,474 13,608 14,256 15,309 16,038 16,632 17,496 18,711 20,412 21,384 24,057 24,948 27,216 30,618 32,076 33,264 34,992 37,422 40,824 42,768 48,114 49,896 56,133 61,236 64,152 74,844 81,648 96,228 99,792 112,266 122,472 128,304 149,688 168,399 192,456 224,532 244,944 299,376 336,798 384,912 449,064 673,596 898,128 1,347,192 and 2,694,384, with no remainder.
Since 2,694,384 cannot be divided by just 1 and 2,694,384, it is not a prime number.