Q: What is the digital root of 100,645,789

 A: 4

Why is 4 the digital root of the number 100,645,789?

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 100,645,789?


Split the number up and add each digit together:


1 + 0 + 0 + 6 + 4 + 5 + 7 + 8 + 9 = 40

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

4 + 0 = 4

What is the digital root of number 100,645,789?

Answer: 4


More Examples

Number 100,645,787100,645,788100,645,790100,645,791
Digital Root 2356

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