3806
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6264
- Proper Divisor Sum (Aliquot Sum)
- 2458
- 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
- 1720
- Möbius Function
- -1
- Radical
- 3806
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 131
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Coordination sequence T1 for Zeolite Code DAC.at n=39A008067
- Coordination sequence T4 for Zeolite Code STI.at n=42A008237
- Coordination sequence T5 for Zeolite Code DFO.at n=47A009879
- Powers of fifth root of 19 rounded down.at n=14A018168
- Powers of fifth root of 19 rounded to nearest integer.at n=14A018169
- Sum of squares of first n positive integers congruent to 1 mod 3.at n=10A024215
- Expansion of 1/((1-2x)(1-4x)(1-7x)(1-9x)).at n=3A025972
- a(n) = Sum_{k=0..n} (k+1) * A026780(n, n-k).at n=8A027252
- "BGK" (reversible, element, unlabeled) transform of 0,1,1,1,...at n=30A032060
- Multiplicity of highest weight (or singular) vectors associated with character chi_109 of Monster module.at n=39A034497
- Numerators of continued fraction convergents to sqrt(473).at n=5A041902
- Numbers k such that the string 8,8 occurs in the base 9 representation of k but not of k-1.at n=46A044331
- Composite numbers whose 3 prime factors are distinct in length.at n=32A046443
- Length of A001388(n).at n=27A046639
- Starting from generation 5 add previous and next term yielding generation 6.at n=29A048452
- Starting positions of strings of 2 7's in the decimal expansion of Pi.at n=33A050254
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 24.at n=22A051989
- Composite numbers x such that sigma(x+120) = sigma(x)+120.at n=16A054985
- Sum of terms in n-th row of A081491.at n=10A081492
- Sum of smallest parts of all partitions of n into distinct parts.at n=42A092265