3866
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5802
- Proper Divisor Sum (Aliquot Sum)
- 1936
- 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
- 1932
- Möbius Function
- 1
- Radical
- 3866
- Omega Function (Ω)
- 2
- 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
- yes
- Squarefree Number
- yes
- 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 trees in an n-node wheel.at n=18A002985
- Essentially n-ary operations in a certain 3-element algebra.at n=2A007158
- Coordination sequence T1 for Zeolite Code AEI.at n=47A008001
- If a, b in sequence, so is ab+5.at n=44A009304
- Coordination sequence T1 for Zeolite Code CGF.at n=43A019451
- Numbers k such that the continued fraction for sqrt(k) has period 31.at n=17A020370
- Coordination sequence for root lattice B_3.at n=14A022145
- OR-convolution of squares A000290 with themselves.at n=17A033459
- Multiplicity of highest weight (or singular) vectors associated with character chi_37 of Monster module.at n=34A034425
- Number of partitions of n into parts 3k and 3k+1 with at least one part of each type.at n=41A035618
- Number of partitions in parts not of the form 17k, 17k+1 or 17k-1. Also number of partitions with no part of size 1 and differences between parts at distance 7 are greater than 1.at n=37A035962
- Numbers n such that string 6,6 occurs in the base 10 representation of n but not of n-1.at n=38A044398
- Numbers n such that string 6,6 occurs in the base 10 representation of n but not of n+1.at n=38A044779
- Starting positions of strings of 2 4's in the decimal expansion of Pi.at n=39A050230
- Positive numbers k such that, in base 3, 2^k and 2^(k+1) have the same number of digits and the same number of 0's.at n=48A056734
- Coordination sequence T2 for Zeolite Code MTF.at n=37A057305
- Coordination sequence T2 for Zeolite Code ASV.at n=44A057311
- Coordination sequence T1 for Zeolite Code SFE.at n=41A057317
- Starting positions of strings of three 4's in the decimal expansion of Pi.at n=4A083615
- Semiprimes sandwiched between semiprimes.at n=41A086005