A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4523040 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 40 45 48 54 60 72 80 81 90 96 108 120 135 144 160 162 180 216 240 270 288 324 349 360 405 432 480 540 648 698 720 810 864 1,047 1,080 1,296 1,396 1,440 1,620 1,745 2,094 2,160 2,592 2,792 3,141 3,240 3,490 4,188 4,320 5,235 5,584 6,282 6,480 6,980 8,376 9,423 10,470 11,168 12,564 12,960 13,960 15,705 16,752 18,846 20,940 25,128 27,920 28,269 31,410 33,504 37,692 41,880 47,115 50,256 55,840 56,538 62,820 75,384 83,760 94,230 100,512 113,076 125,640 141,345 150,768 167,520 188,460 226,152 251,280 282,690 301,536 376,920 452,304 502,560 565,380 753,840 904,608 1,130,760 1,507,680 2,261,520 and 4,523,040, with no remainder.
Since 4,523,040 cannot be divided by just 1 and 4,523,040, it is not a prime number.