Q: Is 820,400 a Prime Number?
A: No, 820,400 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 820400 can be evenly divided by 1 2 4 5 7 8 10 14 16 20 25 28 35 40 50 56 70 80 100 112 140 175 200 280 293 350 400 560 586 700 1,172 1,400 1,465 2,051 2,344 2,800 2,930 4,102 4,688 5,860 7,325 8,204 10,255 11,720 14,650 16,408 20,510 23,440 29,300 32,816 41,020 51,275 58,600 82,040 102,550 117,200 164,080 205,100 410,200 and 820,400, with no remainder.
Since 820,400 cannot be divided by just 1 and 820,400, it is not a prime number.