74 (number)

Short description: Natural number

| <- 73  | 74 |  75 ->

|
|

← 70 71 72 73 74 75 76 77 78 79 →

List of numbers — Integers

← 0 10 20 30 40 50 60 70 80 90 →

Cardinal| seventy-four
Ordinal| 74th
(seventy-fourth)
Factorization| 2 × 37
Divisors| 1, 2, 37, 74
Greek numeral| ΟΔ´
Roman numeral| LXXIV
Binary| 10010102
Ternary| 22023
Quaternary| 10224
Quinary| 2445
Senary| 2026
Octal| 1128
Duodecimal| 6212
Hexadecimal| 4A16
Vigesimal| 3E20
Base 36| 2236

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

## Contents

* 1 In mathematics
* 2 In science
* 2.1 In astronomy
* 3 In music
* 4 In other fields
* 5 References

## 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

See also: List of highways numbered 74

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

1. ↑ Sloane, N. J. A., ed. "Sequence A001358". OEIS Foundation. https://oeis.org/A001358.
2. ↑ "Sloane's A005277 : Nontotients". OEIS Foundation. https://oeis.org/A005277.
3. ↑ Sloane, N. J. A., ed. "Sequence A306445 (Number of collections of subsets of {1, 2, ..., n} that are closed under union and intersection)". OEIS Foundation. https://oeis.org/A306445. Retrieved 2022-05-22.
4. ↑ Sloane, N. J. A., ed. "Sequence A006872". OEIS Foundation. https://oeis.org/A006872.
5. ↑ "Sloane's A007033: Non-Hamiltonian polyhedra with n nodes.". OEIS Foundation. https://oeis.org/A007033.

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