Q: What is the digital root of 402,042,540

 A: 3

Why is 3 the digital root of the number 402,042,540?

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 402,042,540?


Split the number up and add each digit together:


4 + 0 + 2 + 0 + 4 + 2 + 5 + 4 + 0 = 21

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

2 + 1 = 3

What is the digital root of number 402,042,540?

Answer: 3


More Examples

Number 402,042,538402,042,539402,042,541402,042,542
Digital Root 1245

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