3386
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5082
- Proper Divisor Sum (Aliquot Sum)
- 1696
- 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
- 1692
- Möbius Function
- 1
- Radical
- 3386
- 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
- 35
- 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
- Pisot sequence E(10,18), a(n)=[ a(n-1)^2/a(n-2)+1/2 ].at n=10A014006
- Number of partitions of n into distinct parts, none being 6.at n=53A015753
- Numbers k such that the continued fraction for sqrt(k) has period 19.at n=24A020358
- The sequence M(n) in A022905.at n=21A022908
- a(n) = s(1)s(n) + s(2)s(n-1) + ... + s(k)s(n+1-k), where k = [ (n+1)/2 ], s = A001950 (upper Wythoff sequence).at n=16A024689
- Numbers having period-1 7-digitized sequences.at n=18A031201
- Coordination sequence T4 for Zeolite Code CFI.at n=38A033602
- Multiplicity of highest weight (or singular) vectors associated with character chi_137 of Monster module.at n=38A034525
- Number of true prime powers whose binary order, ceiling(log_2(p^x)), is n.at n=33A036380
- Numbers n such that string 8,6 occurs in the base 10 representation of n but not of n-1.at n=36A044418
- Numbers n such that string 8,6 occurs in the base 10 representation of n but not of n+1.at n=36A044799
- Numbers having, in base 15, (sum of even run lengths)=(sum of odd run lengths).at n=10A044886
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 19.at n=4A051984
- a(n)^2 is a square whose digits occur with an equal minimum frequency of 2.at n=10A052049
- Number of 2 X 2 singular integer matrices with elements from {0,...,n}.at n=21A059306
- Smallest "inconsummate number" in base n greater than in the previous base.at n=45A061381
- (-1)^(n+1)/6*sum(k=1,2n+1,C(2n+1,k)*B(k)*3^k) where C(n,k) are the binomial coefficients, B(k) the Bernoulli numbers.at n=4A069988
- Smallest x such that Floor[A000040(x)/A002808(x)]=n.at n=7A073459
- Semiprimes sandwiched between semiprimes.at n=38A086005
- A089450 indexed by A000040.at n=3A089525