A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 468000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 25 26 30 32 36 39 40 45 48 50 52 60 65 72 75 78 80 90 96 100 104 117 120 125 130 144 150 156 160 180 195 200 208 225 234 240 250 260 288 300 312 325 360 375 390 400 416 450 468 480 500 520 585 600 624 650 720 750 780 800 900 936 975 1,000 1,040 1,125 1,170 1,200 1,248 1,300 1,440 1,500 1,560 1,625 1,800 1,872 1,950 2,000 2,080 2,250 2,340 2,400 2,600 2,925 3,000 3,120 3,250 3,600 3,744 3,900 4,000 4,500 4,680 4,875 5,200 5,850 6,000 6,240 6,500 7,200 7,800 9,000 9,360 9,750 10,400 11,700 12,000 13,000 14,625 15,600 18,000 18,720 19,500 23,400 26,000 29,250 31,200 36,000 39,000 46,800 52,000 58,500 78,000 93,600 117,000 156,000 234,000 and 468,000, with no remainder.
Since 468,000 cannot be divided by just 1 and 468,000, it is not a prime number.