A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2404710 can be evenly divided by 1 2 3 5 6 7 9 10 11 14 15 18 21 22 30 33 35 42 45 55 63 66 70 77 90 99 105 110 126 154 165 198 210 231 315 330 347 385 462 495 630 693 694 770 990 1,041 1,155 1,386 1,735 2,082 2,310 2,429 3,123 3,465 3,470 3,817 4,858 5,205 6,246 6,930 7,287 7,634 10,410 11,451 12,145 14,574 15,615 19,085 21,861 22,902 24,290 26,719 31,230 34,353 36,435 38,170 43,722 53,438 57,255 68,706 72,870 80,157 109,305 114,510 133,595 160,314 171,765 218,610 240,471 267,190 343,530 400,785 480,942 801,570 1,202,355 and 2,404,710, with no remainder.
Since 2,404,710 cannot be divided by just 1 and 2,404,710, it is not a prime number.