A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2768850 can be evenly divided by 1 2 3 5 6 7 9 10 14 15 18 21 25 27 30 35 42 45 50 54 63 70 75 90 105 126 135 150 175 189 210 225 270 293 315 350 378 450 525 586 630 675 879 945 1,050 1,350 1,465 1,575 1,758 1,890 2,051 2,637 2,930 3,150 4,102 4,395 4,725 5,274 6,153 7,325 7,911 8,790 9,450 10,255 12,306 13,185 14,650 15,822 18,459 20,510 21,975 26,370 30,765 36,918 39,555 43,950 51,275 55,377 61,530 65,925 79,110 92,295 102,550 110,754 131,850 153,825 184,590 197,775 276,885 307,650 395,550 461,475 553,770 922,950 1,384,425 and 2,768,850, with no remainder.
Since 2,768,850 cannot be divided by just 1 and 2,768,850, it is not a prime number.