🔮 Armstrong Number Checker
Check if a number is an Armstrong number (narcissistic number) with detailed calculation
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📖 What is an Armstrong Number?
- An Armstrong number (also called narcissistic number) is a number that equals the sum of its own digits each raised to the power of the number of digits
- Example: 153 = 1³ + 5³ + 3³ = 1 + 125 + 27 = 153
- 3-digit Armstrong numbers: 153, 370, 371, 407
- Single-digit numbers (0-9) are all Armstrong numbers