3028
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5306
- Proper Divisor Sum (Aliquot Sum)
- 2278
- 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
- 1512
- Möbius Function
- 0
- Radical
- 1514
- Omega Function (Ω)
- 3
- 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
- 110
- 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
- Coordination sequence T2 for Zeolite Code LTN.at n=38A008141
- Coordination sequence T1 for Zeolite Code MTN.at n=33A008186
- Coordination sequence T3 for Zeolite Code NON.at n=33A008214
- Sum of gcd(x, y) for 1 <= x, y <= n.at n=34A018806
- Sum of digits in n-th term of A022470.at n=25A022475
- Numbers with exactly 6 1's in their ternary expansion.at n=28A023697
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Fibonacci numbers), t = (primes).at n=17A024468
- Duplicate of A024468.at n=17A025080
- a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (Fibonacci numbers), t = (primes).at n=16A025088
- a(n) = T(n,0) + T(n,1) + ... + T(n,[ n/2 ]), T given by A026907.at n=7A026916
- Base-3 digits are, in order, the first n terms of the periodic sequence with initial period 1,1,0.at n=7A033130
- Multiplicity of highest weight (or singular) vectors associated with character chi_95 of Monster module.at n=36A034483
- Number of partitions in parts not of the form 21k, 21k+3 or 21k-3. Also number of partitions with at most 2 parts of size 1 and differences between parts at distance 9 are greater than 1.at n=30A035981
- Number of pairs {i,j}, i>1, j>1, such that ij < n^2.at n=32A037048
- Sums of 6 distinct powers of 3.at n=15A038468
- Numbers n such that string 2,8 occurs in the base 10 representation of n but not of n-1.at n=33A044360
- Numbers n such that string 2,8 occurs in the base 10 representation of n but not of n+1.at n=33A044741
- Discriminants of imaginary quadratic fields with class number 10 (negated).at n=43A046007
- Number of semi-meanders of order n with 6 components.at n=5A046725
- Triangle of numbers of semi-meanders of order n with k components.at n=60A046726