8875
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 28
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 11232
- Proper Divisor Sum (Aliquot Sum)
- 2357
- 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
- 7000
- Möbius Function
- 0
- Radical
- 355
- Omega Function (Ω)
- 4
- 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
- 96
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers k such that the continued fraction for sqrt(k) has period 62.at n=38A020401
- Length of A001388(n).at n=30A046639
- a(n) = 1 + Sum_{i=1..n} phi(i)^2.at n=40A049454
- a(n) = (1/24)*n*(n + 5)*(n^2 + n + 6).at n=19A051743
- a(n) = n * 4^(n-1) + (2*4^n + 1) / 3.at n=6A087449
- Numbers n where |sinc(n)| decreases monotonically to 0 (where sinc(x)=sin(x)/x).at n=50A131975
- Numbers k such that k and k^2 use only the digits 2, 5, 6, 7 and 8.at n=25A137111
- Twin natural nonprimes with nonprime number of prime factors.at n=35A171995
- a(1) = 1, and for each k >=2, a(k) is the smallest number n such that n/sin(n) > a(k)/sin(a(k)), so that a(1)/sin(a(1)) > a(2)/sin(a(2)) > ... > a(k)/sin(a(k)) > ...at n=26A172445
- Number of permutations of 1..n with displacements restricted to {-6,-5,-4,-3,-2,0,1}.at n=17A189593
- Number of partitions of n such that the number of parts or the number of distinct parts is a part.at n=36A241381
- Permutation of natural numbers: a(n) = A245707(A245608(n)).at n=62A245706
- (2n^7 + 4n^6 - n^5 - 4n^4 - n^3) / 24.at n=5A245940
- Number of factorizations of m^n into 3 factors, where m is a product of exactly 3 distinct primes and each factor is a product of n primes (counted with multiplicity).at n=24A257464
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 493", based on the 5-celled von Neumann neighborhood.at n=30A282658
- Number x = concat(MSD(x),b) such that MSD(x)*b = phi(x), where MSD(x) is the Most Significant Digit of x and phi(x) is the Euler totient function of x.at n=21A286130
- Number of nX6 0..1 arrays with every element equal to 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=8A298955
- Sum of the third largest parts in the partitions of n into 6 parts.at n=38A308871
- Expansion of (2 + 6*x + 3*x^2 +4*x^3 - 10*x^4)/(1 - x - 4*x^4 + 4*x^5).at n=23A309792
- Sum of the third largest parts of the partitions of n into 9 parts.at n=36A326471