3886
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
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 6120
- Proper Divisor Sum (Aliquot Sum)
- 2234
- 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
- 1848
- Möbius Function
- -1
- Radical
- 3886
- Omega Function (Ω)
- 3
- 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
- 38
- 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
- Coordination sequence T1 for Zeolite Code AET.at n=43A008007
- Coordination sequence T2 for Zeolite Code MEP.at n=37A008158
- Coordination sequence T2 for Zeolite Code VFI.at n=48A008246
- Coordination sequence T1 for Zeolite Code CON.at n=44A009868
- Numbers n such that phi(n) * sigma(n) + 9 is a perfect square.at n=40A015728
- Numbers k such that the continued fraction for sqrt(k) has period 62.at n=7A020401
- a(n) = (d(n)-r(n))/2, where d = A026037 and r is the periodic sequence with fundamental period (1,0,0,1).at n=26A026038
- "BGJ" (reversible, element, labeled) transform of 2,2,2,2...at n=6A032052
- Number of 4-ary rooted trees with n nodes and height at most 8.at n=12A036613
- Coordination sequence T2 for Zeolite Code AEN.at n=39A047951
- Trajectory of 19 under the `19x+1' map.at n=12A057685
- Second 11-gonal (or hendecagonal) numbers: a(n) = n*(9*n+7)/2.at n=29A062728
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 95 ).at n=12A063368
- Regard A064413 as giving a permutation of the positive integers; sequence gives second infinite cycle, beginning at its smallest term, 73.at n=37A064667
- Coordination sequence for ReO_3 net with respect to oxygen atom O_1.at n=36A066394
- Numbers k such that phi(k-1) < phi(k) < phi(k+1), where phi is the Euler totient function (A000010).at n=30A078776
- a(n) = number of m such that A080737(m) <= 2n.at n=30A080740
- G.f. satisfies A^4 = BINOMIAL(A^3).at n=5A090353
- Least multiple of n such that the n-th concatenation is a multiple of n. The (previous) (n-1)-th term is so chosen that the n-th term exists.at n=57A090512
- Numbers n such that 6n+5, 6n+11, 6n+17, 6n+23 are consecutive primes or 6n+1, 6n+7, 6n+13, 6n+19 are consecutive primes.at n=15A090833