Radio Lab is a fabulous radio show from WNZC. A program from October 2009 delves into numbers including the origin of Erdös numbers as well as some interesting stories of the idiosyncrasies of the prolific mathematician Paul Erdös, after whom the numbers were named. It is definitely worth a listen.
From Benford to Erdös
*The Man Who Loved Only Numbers, Paul Hoffman, Hyperion Press, 1998