Fatto generale: 2812 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 2812 is the number of 8-pents.
Trivia: 2812 is an unremarkable number.
Data storica: September 12th is the day in 2008 that the 2008 Chatsworth train collision in Los Angeles between a Metrolink commuter train and a Union Pacific freight train kills 25 people.