5826
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 11664
- Proper Divisor Sum (Aliquot Sum)
- 5838
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1940
- Möbius Function
- -1
- Radical
- 5826
- 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
- 111
- 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
- a(n) = n^3 - floor( n/3 ).at n=18A002901
- Numbers k such that sigma(k) = sigma(k+4).at n=11A015863
- 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=4A031574
- Lengths of successive generations of the Kolakoski sequence A000002.at n=19A054352
- Numbers which are the sum of their proper divisors containing the digit 9.at n=16A059468
- Maximal value of Sum_{i=1..n} (p(i) - p(i+1))^2, where p(n+1) = p(1), as p ranges over all permutations of {1, 2, ..., n}.at n=25A064842
- Cube root of A061096(n).at n=26A067177
- Number of non-associative non-commutative non-anti-associative anti-commutative closed binary operations on a set of order n.at n=2A079232
- a(n) = C(n-2,2)+C(n-5,5)+...+C(n-(3*floor((n-3)/3)+2),3*floor((n-3)/3)+2).at n=21A101551
- Numbers k such that binomial(3k, k) + 1 is prime.at n=17A125221
- Row sums of triangle A137710.at n=12A137711
- Numbers n such that one of floor(10^n * Pi) or ceiling(10^n * Pi) is prime.at n=10A140515
- A recursion triangle sequence based on the Eulerian numbers: A(n,k)=n*A(n-1,k-1)+k*Eulerian(n-1,k).at n=22A157743
- Sums of 3 consecutive semiprimes.at n=24A173968
- Sums of three consecutive numbers each of which is the product of two distinct primes and each of which has no exponent greater than one for either of its two prime factors.at n=22A173969
- Number of n X 2 0..2 arrays with row sums equal and column sums unequal to adjacent columns.at n=7A203485
- Sum of the maximum cycle length over all functions f:{1,2,...,n} -> {1,2,...,n} (endofunctions).at n=5A208248
- Integers n such that appending some decimal digit to the first n digits of Pi results in a prime.at n=25A231336
- First occurrence of n in A234323: Number of nontrivial zeros of the Riemann zeta function in the interval 1/2 + i[n,n+1).at n=3A234800
- Positions of 3's in A234323.at n=0A234804