Английская Википедия:74 (number)
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Шаблон:Infobox number 74 (seventy-four) is the natural number following 73 and preceding 75.
In mathematics
74 is:
- the twenty-first distinct semiprime[1] 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.[2]
- the number of collections of subsets of {1, 2, 3} that are closed under union and intersection.[3]
- φ(74) = φ(σ(74)).[4]
There are 74 different non-Hamiltonian polyhedra with a minimum number of vertices.[5]
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
Шаблон:Seealso 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"
References
Шаблон:Reflist Шаблон:Integers
