A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3754800 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 25 28 30 35 36 40 42 45 48 50 56 60 63 70 72 75 80 84 90 100 105 112 120 126 140 144 149 150 168 175 180 200 210 225 240 252 280 298 300 315 336 350 360 400 420 447 450 504 525 560 596 600 630 700 720 745 840 894 900 1,008 1,043 1,050 1,192 1,200 1,260 1,341 1,400 1,490 1,575 1,680 1,788 1,800 2,086 2,100 2,235 2,384 2,520 2,682 2,800 2,980 3,129 3,150 3,576 3,600 3,725 4,172 4,200 4,470 5,040 5,215 5,364 5,960 6,258 6,300 6,705 7,152 7,450 8,344 8,400 8,940 9,387 10,430 10,728 11,175 11,920 12,516 12,600 13,410 14,900 15,645 16,688 17,880 18,774 20,860 21,456 22,350 25,032 25,200 26,075 26,820 29,800 31,290 33,525 35,760 37,548 41,720 44,700 46,935 50,064 52,150 53,640 59,600 62,580 67,050 75,096 78,225 83,440 89,400 93,870 104,300 107,280 125,160 134,100 150,192 156,450 178,800 187,740 208,600 234,675 250,320 268,200 312,900 375,480 417,200 469,350 536,400 625,800 750,960 938,700 1,251,600 1,877,400 and 3,754,800, with no remainder.
Since 3,754,800 cannot be divided by just 1 and 3,754,800, it is not a prime number.