is the Double Factorial of 6 ,
four dozens, a Highly Composite Number , a 17- Gonal Number and a Harshad Number .
48 is the smallest number with exactly ten Divisor s.
There are 11 solutions to the equation φ (''x'') = 48, namely 65, 104, 105, 112, 130, 140, 144, 156, 168, 180 and 210. This is more than any integer below 48, making 48 a Highly Totient Number .
- The series which began on -1331 February 8 and ended on -15 April 9 . The duration of Saros series 48 was 1316.2 years, and it contained 74 solar eclipses.
is also:
- twice the total number of major and minor keys in the Western tonal music ( Twenty-four ), not counting enharmonic equivalents. Johann Sebastian Bach 's '' Well-Tempered Clavier '' is informally known as ''The Forty-Eight'' because it consists of a prelude and a fugue in each major and minor key, for a total of forty-eight pieces.
- the code for international direct dial phone calls to Poland .
- the model number of the HP-48 S/SX/G/GX/G+/GII
- The car number of NASCAR Nextel Cup driver Jimmie Johnson
- the number of Hour s in two days, and hence also part of the title of the movies ''48 Hrs.'' and ''Another 48 Hrs.'', starring Eddie Murphy and Nick Nolte
- the number of hours one has to make a film in the 48 Hour Film Project
- the number of episodes of ''''.
- the years AD , 48 BC , or 1948 .
- the number of cards in a deck of Pinochle playing cards.
- in a recent study done in England 48 was voted the popular number in the 40s beating both 49 & 45
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