74 (number)

74 (seventy-four) is the natural number following 73 and preceding 75.

In mathematics
74 is:


 * the twenty-first distinct semiprime and the eleventh of the form (2.q), where q is a higher prime.
 * with an aliquot sum of 40, within an aliquot sequence of three composite numbers (74,40,50,43,1,0) to the Prime in the 43-aliquot tree.
 * a palindromic number in bases 6 (2026) and 36 (2236).
 * a nontotient.
 * the number of collections of subsets of {1, 2, 3} that are closed under union and intersection.
 * φ(74) = φ(σ(74)).

There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.

In science

 * The atomic number of tungsten

In astronomy

 * Messier object M74, a magnitude 10.5 spiral galaxy in the constellation Pisces.
 * The New General Catalogue object NGC 74, a galaxy in the constellation Andromeda.

In music

 * Seventy-four, one of the Number Pieces by John Cage
 * "Seventy-Four", a song by the American band Bright from the album The Albatross Guest House

In other fields
Seventy-four is also:
 * The year AD 74, 74 BC, or 1974
 * Designates the 7400 series of Integrated Chips. 74xx xx=00-4538
 * A seventy-four was a third-rate warship with 74 guns.
 * The registry of the U.S. Navy's nuclear aircraft carrier USS John C. Stennis (CVN-74), named after U.S. Senator John C. Stennis
 * A hurricane or typhoon is a system with sustained winds of at least 74 mph (64 knots).
 * The number of the French department Haute-Savoie
 * In the Bible it is the number of people that were in the presence of God on Mount Sinai and saw God without dying "Exodus 24:9-11"