A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 3814440 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 19 20 21 24 28 30 35 38 40 42 56 57 60 70 76 84 95 105 114 120 133 140 152 168 190 210 228 239 266 280 285 380 399 420 456 478 532 570 665 717 760 798 840 956 1,064 1,140 1,195 1,330 1,434 1,596 1,673 1,912 1,995 2,280 2,390 2,660 2,868 3,192 3,346 3,585 3,990 4,541 4,780 5,019 5,320 5,736 6,692 7,170 7,980 8,365 9,082 9,560 10,038 13,384 13,623 14,340 15,960 16,730 18,164 20,076 22,705 25,095 27,246 28,680 31,787 33,460 36,328 40,152 45,410 50,190 54,492 63,574 66,920 68,115 90,820 95,361 100,380 108,984 127,148 136,230 158,935 181,640 190,722 200,760 254,296 272,460 317,870 381,444 476,805 544,920 635,740 762,888 953,610 1,271,480 1,907,220 and 3,814,440, with no remainder.
Since 3,814,440 cannot be divided by just 1 and 3,814,440, it is not a prime number.