Q: What is the digital root of 721,422,478

 A: 1

Why is 1 the digital root of the number 721,422,478?

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 721,422,478?


Split the number up and add each digit together:


7 + 2 + 1 + 4 + 2 + 2 + 4 + 7 + 8 = 37

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

3 + 7 = 10

The answer is more than one digit again, we need to add each digit one more time:

1 + 0 = 1

What is the digital root of number 721,422,478?

Answer: 1


More Examples

Number 721,422,476721,422,477721,422,479721,422,480
Digital Root 8923

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