Q: Is 640,800 a Prime Number?
A: No, 640,800 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 640800 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 72 75 80 89 90 96 100 120 144 150 160 178 180 200 225 240 267 288 300 356 360 400 445 450 480 534 600 712 720 800 801 890 900 1,068 1,200 1,335 1,424 1,440 1,602 1,780 1,800 2,136 2,225 2,400 2,670 2,848 3,204 3,560 3,600 4,005 4,272 4,450 5,340 6,408 6,675 7,120 7,200 8,010 8,544 8,900 10,680 12,816 13,350 14,240 16,020 17,800 20,025 21,360 25,632 26,700 32,040 35,600 40,050 42,720 53,400 64,080 71,200 80,100 106,800 128,160 160,200 213,600 320,400 and 640,800, with no remainder.
Since 640,800 cannot be divided by just 1 and 640,800, it is not a prime number.