I believe it's approximately 1,040 miles per hour at the equator, slowing down gradually as you proceed north or south to, eventually and theoretically, very close to 0 mph at the exact poles.
Check this article at IO
What's freakier yet, is to think about how fast we're moving around the sun, (67,000 mph) and how fast the solar system is rotating around our centratl star. ( 483,000 mph - almost half a million mph !)