The number 1,390,800 can be evenly divided by 1 2 3 4 5 6 8 10 12 15 16 19 20 24 25 30 38 40 48 50 57 60 61 75 76 80 95 100 114 120 122 150 152 183 190 200 228 240 244 285 300 304 305 366 380 400 456 475 488 570 600 610 732 760 912 915 950 976 1,140 1,159 1,200 1,220 1,425 1,464 1,520 1,525 1,830 1,900 2,280 2,318 2,440 2,850 2,928 3,050 3,477 3,660 3,800 4,560 4,575 4,636 4,880 5,700 5,795 6,100 6,954 7,320 7,600 9,150 9,272 11,400 11,590 12,200 13,908 14,640 17,385 18,300 18,544 22,800 23,180 24,400 27,816 28,975 34,770 36,600 46,360 55,632 57,950 69,540 73,200 86,925 92,720 115,900 139,080 173,850 231,800 278,160 347,700 463,600 695,400 and 1,390,800, with no remainder.
Since 1,390,800 cannot be divided by just 1 and 1,390,800, it is a composite number.