Here's a little tidbit, right off of Harold Underdown's Purple Crayon website:
Page Counts and Word Counts
People suggest putting the word count on the first page; I think that information belongs in a cover letter along with the page count, but either way is fine. It looks a little better if you round off your word count. If your word processor does the word count for you, and you get a number such as 43,127 words, it's a good idea to just say "43,000 words."
I tend to round my word count for PBs as well. Instead of 574, I would write 570.