8890
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 25
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 18432
- Proper Divisor Sum (Aliquot Sum)
- 9542
- 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
- 3024
- Möbius Function
- 1
- Radical
- 8890
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 34
- 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
- Number of permutations according to distance.at n=12A002525
- Coordination sequence for sigma-CrFe, Position Xf.at n=24A009958
- cosh(arctanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+33/4!*x^4+180/5!*x^5...at n=7A012718
- Numbers k such that 3^k - 2 is prime.at n=24A014224
- a(n) = (d(n)-r(n))/2, where d = A026066 and r is the periodic sequence with fundamental period (1,0,0,0).at n=35A026067
- Denominators of continued fraction convergents to sqrt(474).at n=13A041905
- Numbers k such that f(k), f(k+1) and f(k+2) are all primes, where f(k) = 8*k^2 + 4*k + 1.at n=34A103777
- Binomial matrix applied to A111418.at n=40A126791
- Weight distribution of [127,64,19] binary quadratic-residue (or QR) code.at n=19A134975
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (-1, 1, 0), (1, -1, 1), (1, 1, 0)}.at n=8A149166
- a(n) = n^4 - n^3 - n^2 - n.at n=10A152016
- a(n) = (2*n^3 + 5*n^2 - 11*n)/2.at n=19A162257
- In those partitions of n with every part >=3, the total number of parts (counted with multiplicity).at n=39A177739
- Inverse permutation to A190016: lexicographical ordering of integers 1 .. 10^4.at n=8A190017
- Expansion of q^(-1/3) * (eta(q) * eta(q^9))^2 / eta(q^3)^4 in powers of q.at n=30A192329
- Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape W; triangle T(n,k), n>=0, 0<=k<=max(0,floor((n-2)/2)*2) read by rows.at n=31A247710
- Indices of the primitive friendly pairs in the sequence of friendly pairs (A050973, A050972) ordered by smallest maximal element.at n=54A263118
- Fixed points of the transform A284803.at n=40A284804
- a(n) is the position of first occurrence of n^2 in the concatenation of the positive integers in decimal representation.at n=49A290647
- Numbers k such that Bernoulli number B_{k} has denominator 4686.at n=5A295770