Q: What is the digital root of 640,028,138
A: 5
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.
Split the number up and add each digit together:
If the answer is more than one digit, you would add each digit of the answer together again:
What is the digital root of number 640,028,138?
Answer: 5
| Number | 640,028,136 | 640,028,137 | 640,028,139 | 640,028,140 |
| Digital Root | 3 | 4 | 6 | 7 |