Fait général: 2806 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2806 is the number of semigroups of order 6 with 2 idempotents.
Culture générale: 2806 is an uninteresting number.
Date historique: September 6th is the day in 2009 that the ro-ro ferry SuperFerry 9 sinks off the Zamboanga Peninsula in the Philippines with 971 persons aboard; all but ten are rescued.