3278
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5400
- Proper Divisor Sum (Aliquot Sum)
- 2122
- 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
- 1480
- Möbius Function
- -1
- Radical
- 3278
- Omega Function (Ω)
- 3
- 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
- 105
- 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
- Generalized sum of divisors function.at n=43A002130
- Number of unrooted triangulations with reflection symmetry of a disk with 2 internal nodes and n+3 nodes on the boundary.at n=11A005509
- Numbers k such that k^64 + 1 is prime.at n=35A006316
- Coordination sequence T4 for Zeolite Code MOR.at n=37A008185
- If a, b in sequence, so is ab+10.at n=22A009368
- Coordination sequence T1 for Keatite.at n=32A009844
- Coordination sequence T3 for Zeolite Code -ROG.at n=43A009861
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite CON = CIT-1 H2[B2Si54O112] starting with a T5 atom.at n=11A019101
- Let c(k) denote the k-th composite number and p(k) the k-th prime number; then a(n) = Sum_{i=n*(n-1)/2+1 .. n*(n+1)/2} c(i) - Sum_{i=1..n} p(i).at n=17A024850
- a(n) = T(2*n+1,n+2), T given by A026998.at n=5A027005
- Number of distinct products i*j*k with 1 <= i < j < k <= n.at n=38A027430
- T(n,n+3), T given by A027960.at n=10A027963
- T(n, 2n-10), T given by A027960.at n=8A027972
- Multiplicity of highest weight (or singular) vectors associated with character chi_13 of Monster module.at n=37A034401
- Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1,0.at n=4A037753
- Denominators of continued fraction convergents to sqrt(734).at n=7A042413
- Denominators of continued fraction convergents to sqrt(765).at n=6A042475
- Numbers having three 4's in base 9.at n=14A043471
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n-1.at n=35A044410
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n+1.at n=35A044791