3568
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
- 2
Divisibility
- Divisor Count
- 10
- Divisor Sum
- 6944
- Proper Divisor Sum (Aliquot Sum)
- 3376
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1776
- Möbius Function
- 0
- Radical
- 446
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 2
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
- 74
- 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 triangulations of the disk G_{n,3}.at n=4A005495
- Number of lines through exactly 4 points of an n X n grid of points.at n=26A018811
- a(n) = n*(7*n - 1)/2.at n=32A022264
- a(n) = [ Sum{(sqrt(j+1)-sqrt(i+1))^2} ], 1 <= i < j <= n.at n=40A025222
- a(n) = T(2*n+1,n+1), T given by A026998.at n=7A027004
- Coordination sequence T4 for Zeolite Code CGS.at n=44A027368
- a(n) = Lucas(n+2) - 3.at n=14A027961
- Every run of digits of n in base 3 has length 2.at n=18A033001
- Number of partitions in parts not of the form 19k, 19k+3 or 19k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 8 are greater than 1.at n=31A035972
- Sum of the lengths of the cycle types of the permutation created by duality and reversal on the partitions of n.at n=28A036050
- Expansion of (3+2*x^2)/(1-x)^4.at n=15A037236
- Coordination sequence T2 for Zeolite Code AWO.at n=41A038407
- Denominators of continued fraction convergents to sqrt(777).at n=7A042499
- Numbers n such that string 6,8 occurs in the base 10 representation of n but not of n-1.at n=38A044400
- Numbers n such that string 6,8 occurs in the base 10 representation of n but not of n+1.at n=38A044781
- 5-morphic but not bimorphic nor automorphic.at n=46A056033
- 5-morphic but not bimorphic, automorphic nor trimorphic.at n=27A056036
- Numbers k such that k^4 == 1 (mod 5^4).at n=22A056091
- Triangle read by rows: T(n,k) = number of k-part order-consecutive partition of {1,2,...,n} (1 <= k <= n).at n=42A056242
- Third diagonal of triangle A056242.at n=6A056243