Hecho general: 1620 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 1620 is a highly abundant number.
Trivia: 1620 is a boring number.
Fecha histórica: June 7th is the day in 1628 that the Petition of Right, a major English constitutional document, is granted the Royal Assent by Charles I and becomes law.