Answer: 700,000
Explanation:
To round the number 672,831 to the nearest hundred thousand, you need to look at the digit in the hundred thousand's place, which is 6 in this case. The digit in the ten thousand's place is 7. Since 7 is greater than or equal to 5, you round the hundred thousand's place up by 1. So, the nearest hundred thousand is 700,000.
Therefore, 672,831 rounded to the nearest hundred thousand is 700,000.