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The CHRISTMAS COUNTDOWN CLOCK
- Thread starter kiwiqpr
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72
72 is an even composite number composed of two prime numbers multiplied together.
What does the number 72 look like?
This visualization shows the relationship between its 2 prime factors (large circles) and 12 divisors.
72 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of twelve divisors.
Prime factorization of 72:
23 × 32
(2 × 2 × 2 × 3 × 3)
See below for interesting mathematical facts about the number 72 from the Numbermatics database.
Quick links:
Names Factors Divisors Bases Roots Scales Fun
Names of 72
- Cardinal: 72 can be written as Seventy-two.
- Scientific notation: 7.2 × 101
- Number of distinct prime factors ω(n):
Divisors of 72- Number of divisors d(n):
Bases of 72- Binary: 10010002
- Hexadecimal: 0x48
- Base-36: 20
- Number of divisors d(n):
- Recreational maths with 72
- 72 backwards is 27
- 72 is a Harshad number.
- The number of decimal digits it has is: 2
- The sum of 72's digits is 9
What's a harshad number I can hear everyone asking steelsy
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Harshad number
Learn more
This article needs additional citations for verification. (July 2019)
In recreational mathematics, a Harshad number (or Niven number) in a given number base is an integer that is divisible by the sum of its digits when written in that base.[1] Harshad numbers in base n are also known as n-harshad (or n-Niven) numbers. Because being a Harshad number is determined based on the base the number is expressed in, a number can be a Harshad number many times over.[2] So-called Trans-Harshad numbers are Harshad numbers in every base.[3]
Harshad numbers were defined by D. R. Kaprekar, a mathematician from India.[4] The word "harshad" comes from the Sanskrit harṣa (joy) + da (give), meaning joy-giver. The term "Niven number" arose from a paper delivered by Ivan M. Niven at a conference on number theory in 1977.
Definition
Examples
Properties
Other bases
Consecutive harshad numbers
Estimating the density of harshad numbers
Sums of harshad numbers
Nivenmorphic numbers
Multiple harshad numbers
References
External links
Last edited 2 months ago by Suriname0
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Mathematics
- 71 is the only two-digit number n such that (nn-n!)/n is prime
- 71 is the largest of the supersingular primes, i.e., the set of primes that divide the group order of the Monster group
- 71 divides the sum of the primes less than it.
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Everyones favourite number....
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And the best year, ever! Right, kiwi
Damn right steelsyEveryones favourite number....
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And the best year, ever! Right, kiwi
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Middle of October and still no Christmas decorations in the shops
What's wrong with these places
What's wrong with these places