Numbers Doom

This is a quest about the history of numbers and the possibilities with numbers.
Did you know what a happy number means, what a positional numeral systeem is, what a amicable number is, why a number can be perfect, etcetera,etcetera. There are a lot of special numbers with very special qualities. And this has never crossed your mind.
In this quest you dive into the number world and you'll find things you never expected to learn about. It will be entertaining, but also extremely difficult. It is probably one of the most difficult apps in the Play Store.
If you succeed in reaching an acceptable score, you'll agree that your brain is capable of great achievements.