380

380 is a natural number that follows 379 and precedes 381. In mathematics, it has the prime factorization 2^2 × 5 × 19, making it a composite and even number. Its divisors include 1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, and 380; the sum of all divisors is 840, so the sum of proper divisors is 460, which classifies 380 as an abundant number. In various bases it is represented as binary 101111100, and in Roman numerals it is CCCLXXX.

In culture and technology, 380 refers to several notable things. The Airbus A380 is a large, four-engine, wide-body airliner developed by Airbus, with its first flight in 2005 and entry into service in 2007. The .380 ACP is a pistol cartridge developed in the early 20th century and widely used in small handguns.

In history, the year AD 380 is notable for the Edict of Thessalonica, issued by Theodosius I along with Gratian and Valentinian II, which established Nicene Christianity as the state religion of the Roman Empire.

In telecommunications, the international calling code +380 is assigned to Ukraine.