Terry Goodkind's Sword of Truth series hovers up around the 400k mark. At least his clock in higher than the one I'm trying to publish.
I almost hesitate to admit — I wrote a book over the summer of 2005 that reached 565k... Longer than War and Peace, and had I tried to publish it, it would have ranked among the top ten longest published works ever. And not at the bottom. That was just ridiculous.