Digit Sum Calculator
Calculate digit sums, digital roots, alternating sums, and other digit-based operations.
Quick Reference
Digit Sum: Sum of all digits (123 → 1+2+3 = 6)
Digital Root: Repeat until single digit (987 → 24 → 6)
Alternating Sum: +first -second +third... (divisibility by 11)
Digit Sum Calculator
Calculate various digit-based operations on numbers including digit sum, digital root, alternating sum, and digit product.
Operations
- Digit Sum: Add all digits together
- Digital Root: Repeat digit sum until single digit
- Alternating Sum: Alternately add and subtract digits
- Sum of Squares: Sum each digit squared
- Digit Product: Multiply all digits
Applications
Digit sums are used for:
- Divisibility tests (digital root)
- Check digit calculations
- Numerology and puzzle solving
- Happy number detection