A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1936200 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 25 28 30 35 40 42 50 56 60 70 75 84 100 105 120 140 150 168 175 200 210 280 300 350 420 461 525 600 700 840 922 1,050 1,383 1,400 1,844 2,100 2,305 2,766 3,227 3,688 4,200 4,610 5,532 6,454 6,915 9,220 9,681 11,064 11,525 12,908 13,830 16,135 18,440 19,362 23,050 25,816 27,660 32,270 34,575 38,724 46,100 48,405 55,320 64,540 69,150 77,448 80,675 92,200 96,810 129,080 138,300 161,350 193,620 242,025 276,600 322,700 387,240 484,050 645,400 968,100 and 1,936,200, with no remainder.
Since 1,936,200 cannot be divided by just 1 and 1,936,200, it is not a prime number.