Let's take a peak at the new Format number action which was released in preview today!
The hash tag format I used is respected across the Power Platform, as well as in applications like Microsoft Excel using custom numeric format strings:
https://docs.microsoft.com/dotnet/standard/base-types/custom-numeric-format-strings
Developer Centric Formats using .Net String standards:
https://docs.microsoft.com/dotnet/standard/base-types/standard-numeric-format-strings
Important: This function is also available in the Advanced Expressions area of the Dynamic Content panel, using the formatNumber(number,'format')
Enjoy!
Audrie
watch?v=oGSL1m7sHuU