Hecho general: 4490 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Hecho matemático: 4490 is a boring number.
Trivia: 4490 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fecha histórica: April 16th is the day in 1922 that the Treaty of Rapallo, pursuant to which Germany and the Soviet Union re-establish diplomatic relations, is signed.