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104 is the natural number following 103 and preceding 105. When written "one hundred four," it is the smallest integer requiring fourteen letters in English.
| Cardinal | one hundred * four |
| Ordinal | 104th (one hundred * fourth) |
| Factorization | |
| Roman numeral | CIV |
| Binary | 1101000 |
| Hexadecimal | 68 |
In mathematics
One hundred * four is a primitive semiperfect number and a composite number, with its divisors being 1, 2, 4, 8, 13, 26, 52 and 104. As it has 8 divisors total, and 8 is one of those divisors, 104 is a refactorable number. The distinct prime factors of 104 add up to 15, and so do the ones of 105, hence the two numbers form a Ruth-Aaron pair under the first definition.
In regular geometry, 104 is the smallest number of unit line segments that can exist in a plane with four of them touching at every vertex.
In science
- The atomic number of rutherfordium.
- Number of degrees Fahrenheit corresponding to 40 Celsius.
In astronomy,
- Messier object M104, a magnitude 9.5 spiral galaxy in the constellation Virgo, also known as the Sombrero Galaxy
- The New General Catalogue object NGC104, a magnitude 4 globular cluster in the constellation Tucana
- The Saros number of the solar eclipse series which began on 470 April 17 and ended on 1714 May 13. The duration of Saros series 104 was 1244.0 years, and it contained 70 solar eclipses.
- The Saros number of the lunar eclipse series which began on 465 July 24 and ended on 1781 October 20. The duration of Saros series 104 was 1316.2 years, and it contained 74 lunar eclipses.
In other fields
104 is also:
- The number of Corinthian columns in the Temple of Olympian Zeus, the largest temple ever built in Greece.
- The number of guns on Admiral Horatio Nelson's flagship HMS Victory.
- The number of Symphonies written by Joseph Haydn on which numbers are agreed upon (though in fact, he wrote more: see list of symphonies by Joseph Haydn).
- The specification of the Soviet Union's first twin-engined jet airliner the Tupolev Tu-104, first produced in 1955.
- The year AD 104 or 104 BC.
- The name of a car, the Peugeot 104.
Ciento cuatro | 104 (nombre) | 104 | 104 (getal) | 104 | 104 (число) | 104 (število) | 104 (tal) | 104 (số) | 104
"104 (number)"