Q: What is the digital root of 21,428,872

 A: 7

Why is 7 the digital root of the number 21,428,872?

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 21,428,872?


Split the number up and add each digit together:


2 + 1 + 4 + 2 + 8 + 8 + 7 + 2 = 34

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

3 + 4 = 7

What is the digital root of number 21,428,872?

Answer: 7


More Examples

Number 21,428,87021,428,87121,428,87321,428,874
Digital Root 5689

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