Enter Number

Calculate the digit sum of 457

Calculate the reduced digit sum of 457

Add up 3 digits of 457:

Digit Sum → 4 + 5 + 7 = 16

Since our digit sum > 9:
repeat this process to get the reduced digit sum:
Our new number to evaluate is 16

Add up 2 digits of 16:

Digit Sum → 1 + 6 = 7

Since our digit sum ≤ 9:
we have our reduced digit sum

Final Answer


Digit Sum = 16
Reduced Digit Sum = 7