5926
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
- 4
- Divisor Sum
- 8892
- Proper Divisor Sum (Aliquot Sum)
- 2966
- 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
- 2962
- Möbius Function
- 1
- Radical
- 5926
- 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
- 36
- Smith Number
- yes
- 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
- Euler transform of 4 3 2 1 1 1 1 1 1 1 ...at n=11A029860
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 76.at n=9A031574
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 38 ones.at n=24A031806
- Base-6 palindromes that start with 4.at n=34A043013
- McKay-Thompson series of class 47A for the Monster group.at n=51A058690
- a(n) gives smallest number requiring n iterations of the map i -> A053392(i) to reach zero.at n=23A060630
- Consecutive terms of A065966 which are also consecutive integers.at n=18A065976
- Numbers equal to a permutation (or rearrangement) of the digits of the sum of their proper divisors (excluding the proper divisor 1). Rearrangements which cause leading zeros are excluded.at n=3A086248
- Triangular array, read by rows: T(n,k) = greatest decimal number of length k contained as a string in the first n positions of the decimal expansion of Pi, 1 <= k <= n.at n=31A086667
- Reversible Smith numbers, i.e., Smith numbers whose reversal is also a Smith number.at n=44A104171
- Pi pseudo-golombization. Size of the chunks of Pi's decimal digits (including the first "3") is given by the digits themselves.at n=2A106156
- Numbers n such that n + phi(n) is a repdigit.at n=17A116018
- Triangle read by rows: A007318^(-1) * A136536.at n=61A136537
- Number of nondecreasing integer sequences of length 22 with sum zero and sum of absolute values 2n.at n=11A158156
- Partial sums of A045542.at n=30A177955
- Number of 3X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 3 zero-sum 2-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=38A192701
- Semiprimes s such that phi(s)/2 is prime.at n=49A194593
- Triangle of coefficients of polynomials v(n,x) jointly generated with A202390; see the Formula section.at n=49A208340
- Triangle of coefficients of polynomials v(n,x) jointly generated with A209419; see the Formula section.at n=50A209420
- Number of 2 X 2 matrices M of positive integers such that permanent(M) < n.at n=35A212151