Q: What is the digital root of 15,420,729

 A: 3

Why is 3 the digital root of the number 15,420,729?

The digital root of a number is calculated by splitting the digits of a number and then adding them together. You keep splitting and adding the digits until you reach a single positive number.

How do you calculate the digital root of 15,420,729?


Split the number up and add each digit together:


1 + 5 + 4 + 2 + 0 + 7 + 2 + 9 = 30

If the answer is more than one digit, you would add each digit of the answer together again:

3 + 0 = 3

What is the digital root of number 15,420,729?

Answer: 3


More Examples

Number 15,420,72715,420,72815,420,73015,420,731
Digital Root 1245

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