1766
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
- 2652
- Proper Divisor Sum (Aliquot Sum)
- 886
- 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
- 882
- Möbius Function
- 1
- Radical
- 1766
- 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
- 29
- 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
- Number of simple imperfect squared squares of order n up to symmetry.at n=22A002962
- G.f.: 1/((1-x)*(1-x^2)*(1-x^3)^2*(1-x^4)*(1-x^5)).at n=29A003402
- Number of points on surface of octahedron; also coordination sequence for cubic lattice: a(0) = 1; for n > 0, a(n) = 4n^2 + 2.at n=21A005899
- Partial sums of cubes of Lucas numbers.at n=4A005971
- Number of 5th-order maximal independent sets in path graph.at n=42A007380
- Coordination sequence T1 for Zeolite Code AFS.at n=32A008023
- Coordination sequence T1 for Zeolite Code BPH.at n=32A008055
- Coordination sequence T3 for Zeolite Code MTT.at n=26A008191
- Coordination sequence T2 for Zeolite Code RTH.at n=29A009894
- Coordination sequence T1 for Zeolite Code VET.at n=25A009902
- a(0) = 1, a(n) = n^2 + 2 for n > 0.at n=42A010000
- a(0) = 1, a(n) = 9*n^2 + 2 for n>0.at n=14A010002
- Expansion of 1/(1-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15-x^16).at n=51A017874
- Expansion of 1/((1-x)(1-2x)(1-4x)(1-9x)).at n=3A021084
- Number of 5's in all partitions of n.at n=27A024789
- Index of 4^n within the sequence of the numbers of the form 3^i*4^j.at n=52A025701
- Coordination sequence T4 for Zeolite Code CGS.at n=31A027368
- Squarefree n such that Q(sqrt(n)) has class number 5.at n=13A029705
- 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 42.at n=0A031540
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 42.at n=1A031720