A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 7302400 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 56 64 70 80 100 112 128 140 160 163 175 200 224 256 280 320 326 350 400 448 560 640 652 700 800 815 896 1,120 1,141 1,280 1,304 1,400 1,600 1,630 1,792 2,240 2,282 2,608 2,800 3,200 3,260 4,075 4,480 4,564 5,216 5,600 5,705 6,400 6,520 8,150 8,960 9,128 10,432 11,200 11,410 13,040 16,300 18,256 20,864 22,400 22,820 26,080 28,525 32,600 36,512 41,728 44,800 45,640 52,160 57,050 65,200 73,024 91,280 104,320 114,100 130,400 146,048 182,560 208,640 228,200 260,800 292,096 365,120 456,400 521,600 730,240 912,800 1,043,200 1,460,480 1,825,600 3,651,200 and 7,302,400, with no remainder.
Since 7,302,400 cannot be divided by just 1 and 7,302,400, it is not a prime number.