1386
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 3744
- Proper Divisor Sum (Aliquot Sum)
- 2358
- 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
- 360
- Möbius Function
- 0
- Radical
- 462
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 34
- 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
- Number of compositions of n into 3 ordered relatively prime parts.at n=56A000741
- MacMahon's generalized sum of divisors function.at n=20A002127
- Octagonal pyramidal numbers: a(n) = n*(n+1)*(2*n-1)/2.at n=10A002414
- Theta series of 6-dimensional lattice A_6^(2) (other names for this lattice or the corresponding quadratic form are LAMBDA_{3,lambda}, P_6^(5), phi_6, F_14).at n=14A002706
- a(n) = 3*binomial(2n-1,n).at n=5A003409
- Degrees of irreducible representations of Higman-Sims group HS.at n=16A003908
- a(n) = floor(1000*log(n)).at n=3A004240
- a(n) = 1000*log(n) rounded to the nearest integer.at n=3A004241
- Coefficients of Chebyshev polynomials.at n=6A005584
- a(n) = a(n-1) + a(n-9) for n >= 9; a(n) = 1 for n=0..7; a(8) = 2.at n=41A005711
- Number of paraffins.at n=17A005998
- Coordination sequence T2 for Zeolite Code EAB and OFF.at n=27A008083
- Coordination sequence T2 for Zeolite Code ERI.at n=27A008094
- Coordination sequence T1 for Zeolite Code MTT.at n=23A008189
- Theta series of direct sum of f.c.c. and b.c.c. lattices.at n=32A008664
- Aliquot sequence starting at 180.at n=8A008891
- Degrees of irreducible representations of group U6(2).at n=13A008948
- List of ordered areas of Pythagorean triangles.at n=45A009111
- Areas of Pythagorean triangles: numbers which can be the area of a right triangle with integer sides.at n=41A009112
- A B_2 sequence: a(n) = least value such that sequence increases and pairwise sums of distinct elements are all distinct.at n=31A011185