In the number 3,207,409 the 4 has a value of 400. The value of a digit in a number is called its___________ value.

place

The value of a digit in a number is called its place value. Place value refers to the position of a digit in a number which determines its value. Each digit has a different place value based on its position in the number. For example, in the number 3,207,409, the digit 4 is in the tens of thousands place, so its place value is 40,000 (4 * 10,000). The place value system helps in understanding and representing numbers in a structured way.