Fait général: 28671 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 28671 is an unremarkable number.
Culture générale: 28671 is an unremarkable number.
Date historique: June 30th is the day in 1864 that U.S. President Abraham Lincoln grants Yosemite Valley to California for "public use, resort and recreation".