8838
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 27
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 19188
- Proper Divisor Sum (Aliquot Sum)
- 10350
- 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
- 2940
- Möbius Function
- 0
- Radical
- 2946
- Omega Function (Ω)
- 4
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 78
- 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
- Numbers n such that n divides the (right) concatenation of all numbers <= n written in base 10 (most significant digit on right).at n=19A029503
- 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 94.at n=0A031592
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 94.at n=1A031772
- Numbers having three 8's in base 10.at n=19A043523
- Interprimes which are of the form s*prime, s=18.at n=22A075293
- Sum_{k=1..n-1} J(2*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=50A097543
- a(n) is a non-palindromic composite located between twin primes whose reverse, which is less than it, is also located between twin primes.at n=12A103741
- Elements of A103741 that do not terminate in a zero digit.at n=2A103764
- Partial sums of A130237.at n=46A130238
- Numbers n such that there is no triangular n-gonal number greater than 1.at n=23A188892
- Numbers n such that 4n+1 is a palindromic prime.at n=28A192261
- Triangle read by rows. T(n, k) = coefficient of x^n in the Taylor expansion of [((1 - x - 2*x^2 - sqrt(1 - 2*x - 3*x^2))/(2*x^2))]^k.at n=60A202710
- Number of n X 5 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=1A208389
- T(n,k)=Number of nXk 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=16A208392
- Number of 2 X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=4A208393
- Trajectory of 80 under the map n-> A006369(n).at n=38A223084
- Number of n X 7 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=4A224145
- T(n,k) = Number of n X k 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=59A224146
- Number of 5 X n 0..1 arrays with rows and antidiagonals unimodal and columns nondecreasing.at n=6A224149
- Number of partitions of n with difference 9 between the number of odd parts and the number of even parts, both counted without multiplicity.at n=33A242700