3834
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 8640
- Proper Divisor Sum (Aliquot Sum)
- 4806
- 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
- 1260
- Möbius Function
- 0
- Radical
- 426
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 56
- 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 weakly connected digraphs with n labeled nodes.at n=3A003027
- Coordination sequence T2 for Zeolite Code AST.at n=45A008037
- Coordination sequence T1 for Zeolite Code MEI.at n=45A008146
- Coordination sequence T1 for Zeolite Code iRON.at n=43A009881
- Coordination sequence T3 for Zeolite Code CZP.at n=40A019458
- T(n,0) + T(n,1) + ... + T(n,n), T given by A027907.at n=8A027914
- Numbers k such that 85*2^k+1 is prime.at n=17A032392
- Number of indecomposable binary [ n,3 ] codes without 0 columns.at n=23A034350
- Decimal part of a(n)^(1/n) starts with a pandigital anagram (digits 0 through 9 in some order).at n=32A035304
- Zeckendorf expansion of n: repeatedly subtract the largest Fibonacci number you can until nothing remains. Little-endian concatenation of decimals.at n=45A035515
- Number of partitions of n into parts 4k+2 and 4k+3 with at least one part of each type.at n=58A035626
- Number of partitions of n into parts not of form 4k+2, 12k, 12k+3 or 12k-3.at n=52A036018
- Coordination sequence T7 for Zeolite Code STT.at n=41A038419
- Numerators of continued fraction convergents to sqrt(318).at n=5A041600
- Numerators of continued fraction convergents to sqrt(831).at n=8A042604
- Numbers whose base-4 representation contains exactly three 2's and three 3's.at n=15A045151
- a(n) = a(1) + a(2) + ... + a(n-1) + a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 3.at n=12A049958
- Numbers n such that 275*2^n-1 is prime.at n=17A050896
- Moebius transform of A000013 (starting at term 0).at n=17A054170
- Number of 3-element proper antichains (i.e., antichains such that every two members have nonempty intersection) on an unlabeled n-element set.at n=12A056782