Q: Is 400,064 a Prime Number?
A: No, 400,064 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 400064 can be evenly divided by 1 2 4 7 8 14 16 19 28 32 38 47 56 64 76 94 112 133 152 188 224 266 304 329 376 448 532 608 658 752 893 1,064 1,216 1,316 1,504 1,786 2,128 2,632 3,008 3,572 4,256 5,264 6,251 7,144 8,512 10,528 12,502 14,288 21,056 25,004 28,576 50,008 57,152 100,016 200,032 and 400,064, with no remainder.
Since 400,064 cannot be divided by just 1 and 400,064, it is not a prime number.