26 (number)
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26 (twenty-six) is the natural number following 25 and preceding 27.
| Cardinal | twenty-six |
| Ordinal | twenty-sixth |
| Factorization | <math>2 \cdot 13<math> |
| Roman numeral | XXVI |
| Binary | 11010 |
| Hexadecimal | 1A |
In mathematics
Twenty-six is a composite number, its proper divisors being 1, 2, and 13. 26 is the only number between a square number and a cube number, the numbers being 25 (5 squared) and 27 (3 cubed).
There is no solution to the equation φ(x) = 26, making 26 a nontotient. Nor is there a solution to x - φ(x) = 26, making 26 a noncototient.
In the classification of finite simple groups there are 26 sporadic groups.
In science
- The atomic number of iron
In astronomy,
- Messier object M26, a magnitude 9.5 open cluster in the constellation Scutum
- The New General Catalogue object (http://www.ngcic.org/) NGC 26, a spiral galaxy in the constellation Pegasus
- The Saros number (http://sunearth.gsfc.nasa.gov/eclipse/SEsaros/SEsaros1-175.html) of the solar eclipse series which began on -2022 March 29 and ended on -724 May 17. The duration of Saros series 26 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 -1937 August 28 and ended on -386 March 17. The duration of Saros series 26 was 1550.5 years, and it contained 87 lunar eclipses.
In other fields
Twenty-six is:
- The number of letters in the English alphabet, if majuscules are not distinguished from minuscules.
- The designation of Interstate 26, a freeway that runs from South Carolina to North Carolina.
- The number of spacetime dimensions in bosonic string theory.
- Often the number of episodes in a Japanese anime series. For example, Cowboy Bebop, Outlaw Star and Trigun.
- Historical years: 26 A.D., 26 B.C., or 1926
de:Sechsundzwanzig
es:Veintiséis fr:26 (nombre) ko:26 ia:26 it:Ventisei he:26 (מספר) nl:26 (getal) ja:26 no:26 (tall) pt:Vinte e seis sl:26 (število) sv:26 (tal) zh:26