3856
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
- 7502
- Proper Divisor Sum (Aliquot Sum)
- 3646
- 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
- 1920
- Möbius Function
- 0
- Radical
- 482
- 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
- 25
- 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
- Definition (1): Number of n-bead binary necklaces with beads of 2 colors where the colors may be swapped but turning over is not allowed.at n=17A000013
- a(n) is the number of distinct (infinite) output sequences from binary n-stage shift register which feeds back the complement of the last stage.at n=17A000016
- Coefficient of q^(2n-1) in the series expansion of Ramanujan's mock theta function f(q).at n=37A000199
- Coordination sequence T1 for Zeolite Code GOO.at n=42A008111
- Coordination sequence T3 for Zeolite Code LIO.at n=43A008131
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BEA = Beta Na7[Al7Si57O128] starting with a T2 atom.at n=11A019068
- Coordination sequence T4 for Zeolite Code CGF.at n=43A019454
- Bisection of A000016 (also of A000013).at n=8A026119
- Molien series for Hecke group H_{3,4}.at n=16A027631
- Numbers k such that k^2 is palindromic in base 15.at n=38A030073
- Numbers whose set of base-15 digits is {1,2}.at n=20A032935
- Growth function of an infinite cubic graph (number of nodes at distance <=n from fixed node).at n=20A038621
- Number of dissectable polyhedra with n tetrahedral cells and symmetry of type B.at n=13A047775
- a(n) = Sum_{ d divides n } phi(d)*2^(n/d)/(2n).at n=14A053634
- a(n) = ceiling(2^(n-1)/n).at n=16A053637
- Number of cyclic graphs with oriented edges on n nodes (up to symmetry of dihedral group).at n=16A053656
- Integers for which the periodic part of the continued fraction for the square root of n begins with 10.at n=38A065013
- Number of subsets of {1,2,3,...,n} that sum to 0 mod 17.at n=16A068038
- 1/17 the number of colorings of an n X n square array with 17 colors.at n=1A068267
- q-factorial numbers 3!_q.at n=15A069778