A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4608240 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 35 39 40 42 48 52 56 60 65 70 78 80 84 91 104 105 112 120 130 140 156 168 182 195 208 210 211 240 260 273 280 312 336 364 390 420 422 455 520 546 560 624 633 728 780 840 844 910 1,040 1,055 1,092 1,266 1,365 1,456 1,477 1,560 1,680 1,688 1,820 2,110 2,184 2,532 2,730 2,743 2,954 3,120 3,165 3,376 3,640 4,220 4,368 4,431 5,064 5,460 5,486 5,908 6,330 7,280 7,385 8,229 8,440 8,862 10,128 10,920 10,972 11,816 12,660 13,715 14,770 16,458 16,880 17,724 19,201 21,840 21,944 22,155 23,632 25,320 27,430 29,540 32,916 35,448 38,402 41,145 43,888 44,310 50,640 54,860 57,603 59,080 65,832 70,896 76,804 82,290 88,620 96,005 109,720 115,206 118,160 131,664 153,608 164,580 177,240 192,010 219,440 230,412 288,015 307,216 329,160 354,480 384,020 460,824 576,030 658,320 768,040 921,648 1,152,060 1,536,080 2,304,120 and 4,608,240, with no remainder.
Since 4,608,240 cannot be divided by just 1 and 4,608,240, it is not a prime number.