3668
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7392
- Proper Divisor Sum (Aliquot Sum)
- 3724
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 1560
- Möbius Function
- 0
- Radical
- 1834
- Omega Function (Ω)
- 4
- 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
- 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
- a(n) is the solution to the postage stamp problem with n denominations and 4 stamps.at n=20A001214
- Coordination sequence T1 for Zeolite Code LIO.at n=42A008129
- Coordination sequence T2 for Zeolite Code NAT.at n=41A008204
- Expansion of sin(log(1+x))*cos(x).at n=8A009455
- Coordination sequence T5 for Zeolite Code RUT.at n=40A009901
- Expansion of (1/theta_4 - 1)/2.at n=20A014968
- Number of triples of different integers from [ 2,n ] with no common factors between pairs.at n=42A015620
- Expansion of 1/(1-x^7-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17).at n=48A017866
- Expansion of x^2*(2 - x + x^2) / ((1 + x)*(1 - x)^4).at n=26A026035
- Decimal part of a(n)^(1/7) starts with n so that a(n) < a(n+1).at n=23A034072
- Coordination sequence for lattice D*_14 (with edges defined by l_1 norm = 1).at n=3A035476
- Number of points of L1 norm 3 in cubic lattice Z^n.at n=14A035597
- Coordination sequence for 14-dimensional cubic lattice.at n=3A035709
- If a Fibonacci sequence is formed with first term = number of digits in n and second term = sum of decimal digits in n, then n itself occurs as a term in the sequence after the first two terms.at n=16A038868
- Number of partitions satisfying 0 < cn(1,5) + cn(4,5) + cn(2,5) and 0 < cn(1,5) + cn(4,5) + cn(3,5).at n=28A039902
- Numerators of continued fraction convergents to sqrt(217).at n=7A041404
- A014486-encodings of Catalan mountain ranges with no sea-level valleys, i.e., the rooted plane general trees with root degree = 1.at n=37A057547
- Number of 3 X 3 matrices, with elements from {0,...,n}, having the property that the middle element of each of the eight 3-element horizontal, vertical and diagonal lines equals the average of the two end elements.at n=27A059329
- Numbers k such that sigma(k) - phi(k) is a cube.at n=22A062385
- Even numbers such that all a(i) + a(j) are distinct.at n=35A080432