What is the difference between the face value of 7 in the numeral 574873 is?

The face value of a digit is the value of the digit itself, regardless of its position in the number. In the numeral 574873, the face value of the digit 7 is 7. The difference between the face value of 7 and its place value in this number is 0, as the place value of 7 in this number is also 7 (tens of thousands place).