16358
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 24540
- Proper Divisor Sum (Aliquot Sum)
- 8182
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 8178
- Möbius Function
- 1
- Radical
- 16358
- 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
- 66
- 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 tournaments on n nodes determined by their score vectors.at n=19A000570
- Generalized Fibonacci numbers.at n=5A015457
- Let r(n) be the real positive root of Sum_{k=1..n} x^k = 1, then a(n) = round(1/(r(n) - 1/2)).at n=11A079460
- Numbers n such that P(4n) is prime, where P(m) is the number of partitions of m.at n=41A111045
- Indices n such that the 3 X 3 matrix with components (row by row) prime(n+k), 0 <= k <= 8, has zero determinant.at n=23A117345
- a(n) = T(p(n)) - p(T(n)) = Commutator[triangular numbers, primes] at n.at n=50A123907
- Row sums of triangle A132731.at n=13A132732
- Row sums of triangle A132823.at n=14A132824
- Double, add 0, double, add 1, double, add 2, double, add 3, etc.at n=25A147678
- T(n,k)=number of nXk binary matrices with rows and columns each in strictly increasing order as binary numbers and the number of 1s in rows being even and in columns being odd.at n=83A181009
- Number of partitions p of n such that the number of parts is a part or max(p) - min(p) is a part.at n=42A241386
- Number of nX2 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors.at n=8A282856
- T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than one of its horizontal, vertical and antidiagonal neighbors.at n=46A282862
- Numbers k such that (206*10^k - 17)/9 is prime.at n=18A284427
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood.at n=13A288399
- Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 629", based on the 5-celled von Neumann neighborhood.at n=13A289969
- a(n) = n^4 - 3*n^3 + 6*n^2 - 5*n + 2 (n >= 1).at n=11A304160
- The real part of b(n) where b(n) = (n + b(n-1)) * (1 + i) with b(-1)=0; i = sqrt(-1).at n=26A309878