The number 1,906,800 can be evenly divided by 1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 25 28 30 35 40 42 48 50 56 60 70 75 80 84 100 105 112 120 140 150 168 175 200 210 227 240 280 300 336 350 400 420 454 525 560 600 681 700 840 908 1,050 1,135 1,200 1,362 1,400 1,589 1,680 1,816 2,100 2,270 2,724 2,800 3,178 3,405 3,632 4,200 4,540 4,767 5,448 5,675 6,356 6,810 7,945 8,400 9,080 9,534 10,896 11,350 12,712 13,620 15,890 17,025 18,160 19,068 22,700 23,835 25,424 27,240 31,780 34,050 38,136 39,725 45,400 47,670 54,480 63,560 68,100 76,272 79,450 90,800 95,340 119,175 127,120 136,200 158,900 190,680 238,350 272,400 317,800 381,360 476,700 635,600 953,400 and 1,906,800, with no remainder.
Since 1,906,800 cannot be divided by just 1 and 1,906,800, it is a composite number.