A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 889200 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 16 18 19 20 24 25 26 30 36 38 39 40 45 48 50 52 57 60 65 72 75 76 78 80 90 95 100 104 114 117 120 130 144 150 152 156 171 180 190 195 200 208 225 228 234 240 247 260 285 300 304 312 325 342 360 380 390 400 450 456 468 475 494 520 570 585 600 624 650 684 720 741 760 780 855 900 912 936 950 975 988 1,040 1,140 1,170 1,200 1,235 1,300 1,368 1,425 1,482 1,520 1,560 1,710 1,800 1,872 1,900 1,950 1,976 2,223 2,280 2,340 2,470 2,600 2,736 2,850 2,925 2,964 3,120 3,420 3,600 3,705 3,800 3,900 3,952 4,275 4,446 4,560 4,680 4,940 5,200 5,700 5,850 5,928 6,175 6,840 7,410 7,600 7,800 8,550 8,892 9,360 9,880 11,115 11,400 11,700 11,856 12,350 13,680 14,820 15,600 17,100 17,784 18,525 19,760 22,230 22,800 23,400 24,700 29,640 34,200 35,568 37,050 44,460 46,800 49,400 55,575 59,280 68,400 74,100 88,920 98,800 111,150 148,200 177,840 222,300 296,400 444,600 and 889,200, with no remainder.
Since 889,200 cannot be divided by just 1 and 889,200, it is not a prime number.