A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 4654440 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 56 60 63 70 72 84 90 105 120 126 140 168 180 210 252 280 315 360 420 504 630 840 1,260 1,847 2,520 3,694 5,541 7,388 9,235 11,082 12,929 14,776 16,623 18,470 22,164 25,858 27,705 33,246 36,940 38,787 44,328 51,716 55,410 64,645 66,492 73,880 77,574 83,115 103,432 110,820 116,361 129,290 132,984 155,148 166,230 193,935 221,640 232,722 258,580 310,296 332,460 387,870 465,444 517,160 581,805 664,920 775,740 930,888 1,163,610 1,551,480 2,327,220 and 4,654,440, with no remainder.
Since 4,654,440 cannot be divided by just 1 and 4,654,440, it is not a prime number.