27 (number) Guide, Meaning , Facts, Information and Description

27 (twenty-seven) is the natural number following 26 and preceding 28. Twenty-seven is the smallest positive integer requiring four syllables to name in English, though it can be unambiguously defined in just two: "three cubed". It is the first composite integer not divisible by any of its digits.

Cardinal	twenty-seven
Ordinal	twenty-seventh
Factorization
Roman numeral	XXVII
Binary	11011
Hexadecimal	1B

In mathematics

Twenty-seven is a perfect cube, being 3³ = 3 × 3 × 3. 27 is 3↑↑2 (using Knuth's up-arrow notation). It is also a decagonal number. It is the magic result of a prime reciprocal magic square of the multiples of 1/7. It is a Smith number and a Harshad number. It is the twenty-seventh (and twenty-eighth) digit in π. (3.141592653589793238462643383279502884197169399375105820974944592).

A 10,000-day-old person is 27 years old (and some months).

In other fields

The 27th moon of Jupiter is Sinope.

Twenty-seven is also:

• The atomic number of cobalt.
• The total number of books in the New Testament of the Holy Bible.
• The number of letters in the Spanish alphabet
• The current number of Amendments to the United States Constitution.
• The age in years at which rock music stars Jim Morrison, Jimi Hendrix, Brian Jones, Janis Joplin and Kurt Cobain died.
• The code for international direct-dialeded phone calls to South Africa.
• "Weird Al" Yankovic hides the number 27 somewhere in many of his songs and videos.
• I-27 is the designation for a US interstate highway in Texas.
• Historical years: 27 A.D., 27 B.C, or 1927

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