Tips on number formatting for better readability

I'm designing a dashboard. One of the components of the dashboard is a Tile Panel that should display values in different units. The problem is those numbers can be really huge and to make it more friendly I'm formatting them using a suffix (k for thousand, M for million, etc.).

So far I have this design:

The problem I'm having is that I can't find a good way to display the "suffix". The way it is now I think it is not drawing the attention it needs and the user may read 3000 and 3 as the same number because he may just let the k pass.

Any tips or good practices about this? Couldn't find anything specific.

Thanks