[fela]

But that is very interesting, that means that when saying the numbers they were basically using something similar to Arabic numbers!

[jacobolus]

In my opinion the important innovation of Hindu–Arabic numbers is not having different symbols for each digit, but rather using the same ten symbols (and no others!) for representing larger groups, which gives the system a lovely uniformity across numbers of different scales.

There aren’t many (if any?) human languages that duplicate this feature of being a purely positional system.