Yes, it does.
15,700,000 is already rounded to the nearest hundred thousands.
15659999
15650000 to 15749999
Any number between 15,650,000 and 15,749,999 will round to 15,700,000 when rounded to the nearest hundred thousand.
Anything from 15650000 to 1574999
15,700,000 because there are no numbers to round behind 700,000
You have a range of numbers that fit this descripton: from 15650000 to 15749999
It is 15700000, exactly as in the question.
15659999
Anything from 15650000 to 15749999
Rounded to the nearest hundred thousand, 929,683 is 900,000 or nine hundred thousand.