2312
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 8
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4605
- Proper Divisor Sum (Aliquot Sum)
- 2293
- 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
- 1088
- Möbius Function
- 0
- Radical
- 34
- Omega Function (Ω)
- 5
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 32
- 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
- yes
- Achilles Number
- yes
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- yes
- Odd
- no
Appears in sequences
- Number of series-reduced planted trees with n leaves. Also the number of essentially series series-parallel networks with n edges; also the number of essentially parallel series-parallel networks with n edges.at n=9A000669
- a(n) = 2*n^2.at n=34A001105
- a(n) = n*(n+1)^2/2.at n=16A006002
- Coordination sequence T1 for Zeolite Code VFI.at n=37A008245
- If a, b in sequence, so is ab+8.at n=16A009331
- Coordination sequence T5 for Zeolite Code CON.at n=34A009872
- Expansion of x^2*(2 - x + x^2) / ((1 + x)*(1 - x)^4).at n=22A026035
- a(n) = (n+1)*binomial(n+1, 15).at n=2A027775
- a(n) = (1/2)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2).at n=35A028724
- Table read by rows: list of even numbers to the right of the central elements of the (2,3)-Pascal triangle A029600.at n=44A029617
- Even numbers to left of central elements of the (3,2)-Pascal triangle A029618.at n=40A029631
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 12.at n=7A031690
- Expansion of Product_{d | 36} theta_3(q^d).at n=42A033748
- Sort then Add, a(1)=19.at n=9A033900
- Coordination sequence for lattice D*_12 (with edges defined by l_1 norm = 1).at n=3A035475
- Number of points of L1 norm 3 in cubic lattice Z^n.at n=12A035597
- Coordination sequence for 12-dimensional cubic lattice.at n=3A035707
- Coordination sequence for 34-dimensional cubic lattice.at n=2A035729
- Coordination sequence for C_34 lattice.at n=1A035771
- Coordination sequence for lattice D*_34 (with edges defined by l_1 norm = 1).at n=2A035802