This part of the "Math Behind Software" series will be focused solely on math. I am going to present to you a few types of numbers that you can find all around and I bet that you never thought that they may even exist. Let's start with the Armstrong numbers.
Numbers
Armstrong Number
In general, an Armstrong number (or narcissistic number) is a number n in a given number base (number of unique digits used to represent the number – the most common base currently is decimal system) b which can be expressed as a sum of its digits raised to the power of b.