Q: Is 400,900 a Prime Number?
A: No, 400,900 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 400900 can be evenly divided by 1 2 4 5 10 19 20 25 38 50 76 95 100 190 211 380 422 475 844 950 1,055 1,900 2,110 4,009 4,220 5,275 8,018 10,550 16,036 20,045 21,100 40,090 80,180 100,225 200,450 and 400,900, with no remainder.
Since 400,900 cannot be divided by just 1 and 400,900, it is not a prime number.