A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 2282400 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 72 75 80 90 96 100 120 144 150 160 180 200 225 240 288 300 317 360 400 450 480 600 634 720 800 900 951 1,200 1,268 1,440 1,585 1,800 1,902 2,400 2,536 2,853 3,170 3,600 3,804 4,755 5,072 5,706 6,340 7,200 7,608 7,925 9,510 10,144 11,412 12,680 14,265 15,216 15,850 19,020 22,824 23,775 25,360 28,530 30,432 31,700 38,040 45,648 47,550 50,720 57,060 63,400 71,325 76,080 91,296 95,100 114,120 126,800 142,650 152,160 190,200 228,240 253,600 285,300 380,400 456,480 570,600 760,800 1,141,200 and 2,282,400, with no remainder.
Since 2,282,400 cannot be divided by just 1 and 2,282,400, it is not a prime number.