Um... well, depends on your font. I think it's around 175 - that's what the site says. It's really a novella length, not a novel, if that makes you feel better.
By the way, that writing group I mentioned who did the 3-day novels has a website...
Clockwork Storybook. Most of their stuff is PG to R rated, I guess... but I like it. Anyway, the group is disbanded, and I don't know how long the website will still be there, but if you go into the Archives section and search by author you can find the 3-day novels that are still there, as well as the authors contest journals. It's pretty neat!