3270
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 7920
- Proper Divisor Sum (Aliquot Sum)
- 4650
- 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
- 864
- Möbius Function
- 1
- Radical
- 3270
- Omega Function (Ω)
- 4
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 43
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- 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 MEP.at n=34A008158
- Coordination sequence T1 for Zeolite Code VFI.at n=44A008245
- Coordination sequence T3 for Zeolite Code ZON.at n=40A009921
- a(n) = n*(29*n + 1)/2.at n=15A022287
- a(1) = 7; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=24A025006
- a(n) = T(2n-1,n), where T is the array in A026098.at n=28A026102
- Number of ordered trees with n edges and having no branches of length 1.at n=15A026418
- Numbers whose set of base-9 digits is {3,4}.at n=26A032833
- Every run of digits of n in base 9 has length 2.at n=35A033007
- Coordination sequence T3 for Zeolite Code SBS.at n=45A033610
- Coordination sequence T14 for Zeolite Code STT.at n=38A038430
- Sums of 6 distinct powers of 3.at n=26A038468
- Numbers whose base-5 representation has exactly 6 runs.at n=12A043606
- Numbers n such that string 2,7 occurs in the base 10 representation of n but not of n-1.at n=36A044359
- Numbers n such that string 7,0 occurs in the base 10 representation of n but not of n-1.at n=35A044402
- Numbers n such that string 7,0 occurs in the base 10 representation of n but not of n+1.at n=35A044783
- Positive integers having more base-9 runs of even length than odd.at n=38A044835
- Numbers whose base-5 representation contains exactly three 0's and two 1's.at n=27A045171
- a(n) = Sum_{ d divides n } q(d), where q(d) = A000009 = number of partitions of d into distinct parts.at n=48A047966
- Let (u1,u2) be successive untouchable numbers such that phi(u1) = phi(u2); sequence gives values of u1.at n=11A048189