2906
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4362
- Proper Divisor Sum (Aliquot Sum)
- 1456
- 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
- 1452
- Möbius Function
- 1
- Radical
- 2906
- Omega Function (Ω)
- 2
- 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
- 48
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Numbers k such that phi(k) = phi(k+2).at n=45A001494
- Numbers k such that 2*10^k - 1 is prime.at n=17A002957
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=22A005897
- Number of planted evolutionary trees of magnitude n.at n=4A007151
- a(0) = 1, a(n) = 24*n^2 + 2 for n>0.at n=11A010014
- Generalized Fibonacci numbers.at n=5A015453
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite LOV = Lovdarite K4Na12 [Be8Si28O72].18H2O starting with a T1 atom.at n=11A019139
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=11A020364
- Fibonacci sequence beginning 4, 10.at n=13A022382
- Coordination sequence T2 for Zeolite Code MWW.at n=36A024987
- First gap of n in sequence A038593 (upper terms).at n=42A038662
- Numbers ending with '6' that are the difference of two positive cubes.at n=16A038861
- Denominators of continued fraction convergents to sqrt(273).at n=8A041513
- Numbers n such that the string 7,8 occurs in the base 9 representation of n but not of n-1.at n=35A044322
- Numbers n such that string 0,6 occurs in the base 10 representation of n but not of n-1.at n=30A044338
- Numbers n such that string 7,8 occurs in the base 9 representation of n but not of n+1.at n=35A044703
- Numbers n such that string 8,7 occurs in the base 9 representation of n but not of n+1.at n=38A044711
- Numbers n such that string 0,6 occurs in the base 10 representation of n but not of n+1.at n=30A044719
- Coefficients of the '6th-order' mock theta function 2 mu(q).at n=37A053273
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 96 ).at n=27A063369