Simple and different : Dikembe Mutombo Looked Like The Happiest Man On Earth After Hawks Announced His Number Retirement The team's surprise announcement brought out Mutombo's massive smile. MOSES ROBINSON VIA GETTY IMAGES Making Dikembe Mutombo happy is a universally good thing. A wildly philanthropic man with a huge heart, Mutombo was once named the most generous athlete in the world by Fox Sports. His relationship with society is purely symbiotic -- a rarity today, but one that deserves all the recognition available. So when Sept. 1 was declared “Dikembe Mutombo Day” in Fulton County, Georgia, it was, undoubtedly, a better day for all. As the day went on, it only got better. On Tuesday night in Atlanta, at a ceremony for Mutombo's day, the Atlanta Hawks upped the ante. With an unsuspecting Mutombo in the audience, Hawks CEO Steve Koonin made a surprise announcement that his No. 55 would be retired and raised to the rafters at Phillips Arena during a nationally televised game against the Boston Celtics on Nov. 24.