3578
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5370
- Proper Divisor Sum (Aliquot Sum)
- 1792
- 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
- 1788
- Möbius Function
- 1
- Radical
- 3578
- 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
- 100
- 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
- Coordination sequence T8 for Zeolite Code MFI.at n=38A008171
- Coordination sequence T1 for Cordierite.at n=36A008251
- If a, b in sequence, so is ab+6.at n=36A009307
- a(n) = floor( n*(n-1)*(n-2)/29 ).at n=48A011911
- Coordination sequence T3 for Zeolite Code TER.at n=40A016435
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite MFS = ZSM-57 H1.5[Al1.5Si34.5O72] starting with a T7 atom.at n=11A019174
- Numbers k such that the continued fraction for sqrt(k) has period 23.at n=12A020362
- a(n) = Sum_{k=1..n} (n-k) * floor(n/k).at n=34A024920
- Coordination sequence T3 for Zeolite Code AWO.at n=41A038405
- Numerators of continued fraction convergents to sqrt(746).at n=4A042436
- Denominators of continued fraction convergents to sqrt(972).at n=8A042881
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n-1.at n=38A044410
- Numbers n such that string 7,8 occurs in the base 10 representation of n but not of n+1.at n=38A044791
- Numbers whose base-5 representation contains exactly two 0's and three 3's.at n=8A045198
- Starting from generation 7 add previous and next term yielding generation 8.at n=9A048454
- a(n) = 7*2^n - 6.at n=9A048489
- Numbers n such that 137*2^n-1 is prime.at n=8A050594
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 23.at n=4A051988
- G.f.: (1+3*x+2*x^2)/((1-x)*(1-2*x^2)).at n=18A063757
- Numbers n such that n and n+1 are semiprimes with a semiprime number of 1's in their binary representation.at n=39A086097