Q: Is 676,400 a Prime Number?
A: No, 676,400 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 676400 can be evenly divided by 1 2 4 5 8 10 16 19 20 25 38 40 50 76 80 89 95 100 152 178 190 200 304 356 380 400 445 475 712 760 890 950 1,424 1,520 1,691 1,780 1,900 2,225 3,382 3,560 3,800 4,450 6,764 7,120 7,600 8,455 8,900 13,528 16,910 17,800 27,056 33,820 35,600 42,275 67,640 84,550 135,280 169,100 338,200 and 676,400, with no remainder.
Since 676,400 cannot be divided by just 1 and 676,400, it is not a prime number.