Q: Is 1,638,000 a Prime Number?
A: No, 1,638,000 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 1638000 can be evenly divided by 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 18 20 21 24 25 26 28 30 35 36 39 40 42 45 48 50 52 56 60 63 65 70 72 75 78 80 84 90 91 100 104 105 112 117 120 125 126 130 140 144 150 156 168 175 180 182 195 200 208 210 225 234 240 250 252 260 273 280 300 312 315 325 336 350 360 364 375 390 400 420 450 455 468 500 504 520 525 546 560 585 600 624 630 650 700 720 728 750 780 819 840 875 900 910 936 975 1,000 1,008 1,040 1,050 1,092 1,125 1,170 1,200 1,260 1,300 1,365 1,400 1,456 1,500 1,560 1,575 1,625 1,638 1,680 1,750 1,800 1,820 1,872 1,950 2,000 2,100 2,184 2,250 2,275 2,340 2,520 2,600 2,625 2,730 2,800 2,925 3,000 3,120 3,150 3,250 3,276 3,500 3,600 3,640 3,900 4,095 4,200 4,368 4,500 4,550 4,680 4,875 5,040 5,200 5,250 5,460 5,850 6,000 6,300 6,500 6,552 6,825 7,000 7,280 7,800 7,875 8,190 8,400 9,000 9,100 9,360 9,750 10,500 10,920 11,375 11,700 12,600 13,000 13,104 13,650 14,000 14,625 15,600 15,750 16,380 18,000 18,200 19,500 20,475 21,000 21,840 22,750 23,400 25,200 26,000 27,300 29,250 31,500 32,760 34,125 36,400 39,000 40,950 42,000 45,500 46,800 54,600 58,500 63,000 65,520 68,250 78,000 81,900 91,000 102,375 109,200 117,000 126,000 136,500 163,800 182,000 204,750 234,000 273,000 327,600 409,500 546,000 819,000 and 1,638,000, with no remainder.
Since 1,638,000 cannot be divided by just 1 and 1,638,000, it is not a prime number.