3860
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 8148
- Proper Divisor Sum (Aliquot Sum)
- 4288
- 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
- 1536
- Möbius Function
- 0
- Radical
- 1930
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 25
- 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
- a(n) = (n+2)*Catalan(n) - 1.at n=7A000777
- a(n) = 3*Catalan(n) - Catalan(n-1) - 1.at n=7A000781
- Quadrinomial coefficients: C(2+n,n) + C(3+n,n) + C(4+n,n).at n=14A005718
- Maximal length of rook tour on an n X n board.at n=17A006071
- Expansion of eta(q^10)^12/(eta(q^2)^4*eta(q^5)^8) in powers of q.at n=16A006710
- Coordination sequence T1 for Zeolite Code APC.at n=43A008032
- Coordination sequence T5 for Zeolite Code GOO.at n=42A008115
- Coordination sequence T1 for Zeolite Code LEV.at n=46A008127
- Coordination sequence T5 for Zeolite Code VNI.at n=38A009911
- Expansion of 1/(1-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12-x^13).at n=38A017844
- Pisot sequence T(5,9), a(n) = floor(a(n-1)^2/a(n-2)).at n=12A020750
- Numbers in which all pairs of consecutive base-9 digits differ by 3.at n=48A033080
- Number of chiral pairs of dissectable polyhedra with n tetrahedral cells and symmetry of type M.at n=13A047769
- a(n) = A047769(2n).at n=6A047770
- Coordination sequence T1 for Zeolite Code DON.at n=42A047953
- a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1, a(2) = 2, and a(3) = 1.at n=15A049903
- Let R(i,j) be the rectangle with antidiagonals 1; 2,3; 4,5,6; ...; each k is an R(i(k),j(k)) and A057041(n)=j(F(n)), where F(n) is the n-th Fibonacci number.at n=36A057041
- Coordination sequence T6 for Zeolite Code MTF.at n=37A057309
- McKay-Thompson series of class 45A for Monster.at n=45A058684
- Convolution of sequence of primes with sequence sigma(n).at n=16A086718