1768
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 3780
- Proper Divisor Sum (Aliquot Sum)
- 2012
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 768
- Möbius Function
- 0
- Radical
- 442
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 3
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 117
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of bond-rooted polyenoids with n edges.at n=7A000913
- Fermat coefficients.at n=5A000972
- Genus of modular group Gamma(n) = genus of modular curve Chi(n).at n=35A001767
- Absolute value of Glaisher's beta'(2n+1).at n=42A002291
- Number of dissections of a polygon.at n=6A003444
- Number of nonequivalent dissections of an n-gon into 3 polygons by nonintersecting diagonals up to rotation and reflection.at n=31A003453
- Number of labeled 3-connected graphs with n nodes.at n=2A005644
- Number of triangulated (n+2)-gons rooted at an exterior edge.at n=7A006078
- Let S denote the palindromes in the language {0,1,2,3}*; a(n) = number of words of length n in the language SS.at n=7A007057
- Coordination sequence T1 for Zeolite Code AFI.at n=29A008014
- Coordination sequence T4 for Zeolite Code MEL.at n=27A008153
- Coordination sequence T7 for Zeolite Code MEL.at n=27A008156
- a(n) = floor(C(n,6)/7).at n=17A011797
- a(n) = floor(n*(n - 1)*(n - 2)/31).at n=39A011913
- Numbers k such that sigma(k) = sigma(k+12).at n=17A015882
- Number of lines through exactly 4 points of an n X n grid of points.at n=22A018811
- a(n) is the concatenation of n and 4n.at n=16A019552
- a(n) = n*(21*n-1)/2.at n=13A022278
- Numbers k such that Fibonacci(k) == 3 (mod k).at n=24A023175
- Numbers that are the sum of 4 distinct nonzero squares in exactly 10 ways.at n=47A025385