Q: What is the digital root of 642,662,289

 A: 9

Why is 9 the digital root of the number 642,662,289?

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 642,662,289?


Split the number up and add each digit together:


6 + 4 + 2 + 6 + 6 + 2 + 2 + 8 + 9 = 45

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

4 + 5 = 9

What is the digital root of number 642,662,289?

Answer: 9


More Examples

Number 642,662,287642,662,288642,662,290642,662,291
Digital Root 7812

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