General fact: 272 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Mathematical fact: 272 is the sum of the coprime counts for the first 29 integers is 270.
Trivia: 272 is a boring number.
Historical date: September 28th is the day in 1066 that William the Bastard (as he was known at the time) invades England beginning the Norman Conquest.