Q: Is 670,400 a Prime Number?
A: No, 670,400 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 670400 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 160 200 320 400 419 800 838 1,600 1,676 2,095 3,352 4,190 6,704 8,380 10,475 13,408 16,760 20,950 26,816 33,520 41,900 67,040 83,800 134,080 167,600 335,200 and 670,400, with no remainder.
Since 670,400 cannot be divided by just 1 and 670,400, it is not a prime number.