A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2994840 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 47 54 59 60 72 90 94 108 118 120 135 141 177 180 188 216 235 236 270 282 295 354 360 376 423 470 472 531 540 564 590 705 708 846 885 940 1,062 1,080 1,128 1,180 1,269 1,410 1,416 1,593 1,692 1,770 1,880 2,115 2,124 2,360 2,538 2,655 2,773 2,820 3,186 3,384 3,540 4,230 4,248 5,076 5,310 5,546 5,640 6,345 6,372 7,080 7,965 8,319 8,460 10,152 10,620 11,092 12,690 12,744 13,865 15,930 16,638 16,920 21,240 22,184 24,957 25,380 27,730 31,860 33,276 41,595 49,914 50,760 55,460 63,720 66,552 74,871 83,190 99,828 110,920 124,785 149,742 166,380 199,656 249,570 299,484 332,760 374,355 499,140 598,968 748,710 998,280 1,497,420 and 2,994,840, with no remainder.
Since 2,994,840 cannot be divided by just 1 and 2,994,840, it is not a prime number.