30 (number)

30 (thirty) is the natural number following 29 and preceding 31.

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Cardinalthirty

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Ordinalthirtieth

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Numeral system

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actorization/">Factorization2cdot 3cdot 5

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Divisors2, 3, 5, 6, 10, 15

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Roman numeralXXX

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Binary11110

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Hexadecimal1E

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Hebrewל (Lamed)

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It is a primorial as well as the sum of the squares of the integers 1, 2, 3 and 4. It is the first sphenic number and the first Giuga number. It is the sum of the first four squares, which makes it a square pyramidal number.

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30 is the largest number such that coprimes smaller than itself are also prime. It is a Harshad number.

Natural number: Natural number can mean either a positive integer (, , , , ...) or a non-negative integer (, , , , , ...)....

Primorial: For n ≥ 2, the primorial (n#) is the product of all prime numbers less than or equal to n. For example, 210 is a primorial which is the product of the first four primes multiplied together (2·3·5·7). The name is attributed to Harvey Dubner. The first few primorials are:...

Sphenic number: A sphenic number (Old Greek sphen = wedge) is a positive integer that is the product of three distinct prime factors. The M?bius function returns when passed any sphenic number....

30 (number) related Images and Photos (experimental)

Number 8 1949	Number 36	Number 23	Number 25
Number 23 (BD)	Number 18 1950	ABBA: Number Ones CD	ABBA: Number Ones CD
Number 23, The (DVD) (WS) (Rated/Unrated)	Summertime: Number 9A 1948	Tree Number Two	Gangster Number 1