It's about one-twenty-fifth the number of Written Characters in the Chinese Language.
In other words, the count of Written Characters in the Chinese Language is 23.980 times 390.(zhōngwén, 中文) (Hànzì, 汉字/漢字; Shuowen Jiezi count; distinct characters)
According to the Han Dynasty dictionary, Shuowen Jiezi (說文解字), there are 9,353 distinct Han characters used to depict the Chinese language. Fluency in written Chinese requires mastery of 4,000 - 5,000 of these characters.
It's about one-twenty-fifth the number of Benches in Central Park.
In other words, the count of Benches in Central Park is 30 times 390.(Manhattan, New York City, New York)
It's about thirty times the number of Living Kings and Queens.
In other words, the count of Living Kings and Queens is 0.038 times 390.(2015 figures) (distinct Monarchs)
As of 2015, the world has fifteen Kings and Queens reigning over 45 countries. Of all these, Queen Elizabeth the II is the only reigning Queen; she has monarchical authority over the sixteen of the Commonwealth nations.
It's about 45 times the number of Symphonies Composed by Beethoven.
In other words, 390 is 43.33333333330 times the count of Symphonies Composed by Beethoven, and the count of Symphonies Composed by Beethoven is 0.0230769230769 times that amount.(a.k.a. Ludwig van Beethoven)
Over the course of his life, Beethoven composed nine symphonies over the course of a twenty-four year period. After his death in early 1827, an estimated 20,000 Austrian citizens attended his public funeral.
It's about 80 times the number of Living U.S. Presidents.
In other words, the count of Living U.S. Presidents is 0.01 times 390.(a.k.a. Presidents of the United States; a.k.a. Presidents of the United States of America; a.k.a. POTUS), (2016 figures) (including current)
It's about one-ninetieth the number of McDonald's Locations in the World.
In other words, the count of McDonald's Locations in the World is 91 times 390.(2015 figures) (approximate)
Operating in 119 countries, there are currently 36,000 McDonald's locations worldwide. From 1955 thru 1993, many McDonald's locations advertised the number in billions of hamburgers sold on their external signs, but abandoned theses updates after the figure passed 100 billion.
It's about one-ninety-fifth the number of Seats in Fenway Park.
In other words, 390 is 0.01052 times the count of Seats in Fenway Park, and the count of Seats in Fenway Park is 95.057 times that amount.(2013 figures; daytime capacity) (a.k.a. The Cathedral of Boston) (Boston, Massachusetts)