Mathematical fact: 4770 is an unremarkable number.
Trivia: 4770 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: January 21st is the day in 1893 that the Tati Concessions Land, formerly part of Matabeleland, is formally annexed to the Bechuanaland Protectorate, now Botswana.