38 (number) - Definition and Overview

38 is the natural number following 37 and preceding 39.

38! - 1 yields 523022617466601111760007224100074291199999999, which is a factorial prime.

There is no answer to the equation φ(x) = 38, making 38 a nontotient.

38 is the sum of the squares of the first three primes.

37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.

In science

• The atomic number of strontium

In astronomy,

Messier object M38, a magnitude 7.0 open cluster in the constellation Auriga

The New General Catalogue object (http://www.ngcic.org/) NGC 38, a spiral galaxy in the constellation Pisces

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -1729 June 26 and ended on -431 August 14. The duration of Saros series 38 was 1298.1 years, and it contained 73 solar eclipses.

The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/LEsaros/LEsaros1-175.html) of the lunar eclipse series which began on -1408 April 16 and ended on -111 June 3. The duration of Saros series 38 was 1298.1 years, and it contained 73 lunar eclipses.

Thirty-eight is also:

• The number of slots on an American Roulette wheel.
• The year A.D. 38, 38 BC, or 1938.
• The number of games that each team in the current English Premiership, the top division in English Association Football, plays in a season
• Bill C-38 could legalize gay marriage in Canada.