I know it says number, but this is ridiculous.
Windows 8 inbuilt Reader app:
I ended up installing Adobe Reader , which at least gets it somewhat right:
What field are you putting that number into? Page number? Why do you have a document with over 123456789 pages?
Although, looking at it now, I realize the alignment's the same on both, so that's probably at least not the Reader app's fault.
Also, when I say ‘Adobe gets it right’, I don't know enough about the standard to say that for sure: for all I know, the standard could mandate such rounding, and Adobe (plus whoever created the document, but that's not important right now) could be the one doing it wrong.