It's about the number of Vertebrae in a Snake's Body
It's about one-and-one-tenth times the number of Sesame Seeds on a Big Mac bun
In other words, the count of Sesame Seeds on a Big Mac bun is 0.910 times 390.(McDonald's sandwich; approximate figures)
It's about four-fifths the number of Olympic Gold Medals Won by the Soviet Union
In other words, 390 is 0.8250 times the count of Olympic Gold Medals Won by the Soviet Union, and the count of Olympic Gold Medals Won by the Soviet Union is 1.210 times that amount.(a.k.a. Union of Soviet Socialist Republics, a.k.a. USSR, a.k.a. Сою́з Сове́тских Социалисти́ческих Респу́блик, a.k.a. CCCP) (a.k.a. Olympic Games, a.k.a. Jeux olympiques) (Summer and Winter Games grand totals; excluding Russian Federation Medals) (1952 thru 1988 figures)
During its 19 appearances in the Summer and Winter Olympic Games, the Soviet Union was awarded 473 gold medals. The Union holds the as-yet-unbroken record for gold medals in gymnastics, with 72.
It's about one-and-one-fourth times the number of Manned Flights to Space
In other words, 390 is 1.250 times the count of a Manned Flights to Space, and the count of a Manned Flights to Space is 0.80 times that amount.(2016 figures) (flights with at least 80km altitude; US, Russia, the Soviet Union, and China)
Since the flight of the Vostok 1 in April, 1961, there have been a total of 312 manned spaceflights under the American, Russian, Soviet, and Chinese space programs. Furthermore, the space programs of the US, Russia, the Soviet Union, France, Argentina, and Iran have launched a total 32 monkeys (specifically rhesus, cynomolgus, and squirrel monkeys, macaques, chimpanzees) into space.
It's about one-and-one-fourth times the number of Beatles Songs
In other words, 390 is 1.260 times the count of Beatles Songs, and the count of Beatles Songs is 0.7940 times that amount.(a.k.a. The Beatles) (1958 thru 1996)
On a total of 58 albums, the Beatles recorded 309 songs during their performing career (with three of the songs released only on post-breakup Anthology albums after 1970). Of their catalog, a total of thirteen songs were number-one chart hits in both the US and the UK.
It's about three-fourths the number of Stores in the Mall of America
In other words, the count of Stores in the Mall of America is 1.30 times 390.(a.k.a. MOA, a.k.a. MoA, a.k.a. Megamall) (Bloomington, Minnesota) (2015 figures) (approximate)
It's about one-and-two-fifths times the number of Professional Baseball Teams in the United States
In other words, 390 is 1.410 times the count of Professional Baseball Teams in the United States, and the count of Professional Baseball Teams in the United States is 0.7090 times that amount.(2016 figures) (includes Major, Minor, and Independent Leagues)