3258
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7098
- Proper Divisor Sum (Aliquot Sum)
- 3840
- 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
- 1080
- Möbius Function
- 0
- Radical
- 1086
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 43
- Smith Number
- yes
- 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) = floor(1000*log(n)).at n=25A004240
- a(n) = 1000*log(n) rounded to the nearest integer.at n=25A004241
- a(n) = n*(5*n+1)/2.at n=36A005475
- Coordination sequence T6 for Zeolite Code VNI.at n=35A009912
- a(n) is the number of integer strings s(0),...,s(n) counted by array T in A026374 that have s(n)=2; also a(n) = T(2n,n-1).at n=5A026376
- a(n) = Sum_{k=0..n-1} T(n,k) * T(n,k+1), with T given by A026374.at n=5A026947
- a(n) = A027082(n, 2n).at n=10A027087
- Number of centered 5-valent trees with n nodes.at n=15A036648
- Number of partitions of n such that cn(0,5) = cn(1,5) <= cn(2,5) = cn(4,5) < cn(3,5).at n=61A036863
- Digit sum of 'even' number equals digit sum of 'sum' and 'juxtaposition' of its prime factors (counted with multiplicity).at n=35A036926
- Numbers whose base-7 representation contains exactly three 3's.at n=26A043407
- Numbers whose base-5 representation has exactly 6 runs.at n=2A043606
- Numbers n such that string 5,8 occurs in the base 10 representation of n but not of n-1.at n=35A044390
- Numbers n such that string 5,8 occurs in the base 10 representation of n but not of n+1.at n=35A044771
- Numbers whose base-5 representation contains exactly two 0's and three 1's.at n=16A045168
- Number of chiral n-ominoes in n-1 space.at n=16A045649
- a(n) = 10*n^2+n.at n=17A055437
- Numbers k such that k^10 == 1 (mod 11^3).at n=23A056085
- Coordination sequence T1 for Zeolite Code SAV.at n=43A057314
- a(1) = 1; thereafter a(n+1) = a(n) + product of nonzero digits of a(n).at n=48A063108