3746
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
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 5622
- Proper Divisor Sum (Aliquot Sum)
- 1876
- 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
- 1872
- Möbius Function
- 1
- Radical
- 3746
- 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
- 87
- 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=39A008171
- Coordination sequence T6 for Zeolite Code NES.at n=39A008210
- Coordination sequence T4 for Zeolite Code SGT.at n=38A008232
- a(0) = 1, a(n) = 26*n^2 + 2 for n>0.at n=12A010016
- Least m such that if r and s in {1/2, 1/5, 1/8,..., 1/(3n-1)}, satisfy r < s, then r < k/m < s for some integer k.at n=40A024823
- Number of partitions of n into distinct parts >= 2.at n=56A025147
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 60.at n=13A031558
- Concatenation of n and n + 9 or {n,n+9}.at n=36A032614
- Numbers whose base-3 representation Sum_{i=0..m} d(i)*3^i has d(m) < d(m-1) > d(m-2) < ...at n=37A032841
- Multiplicity of highest weight (or singular) vectors associated with character chi_4 of Monster module.at n=44A034392
- Number of partitions of 5n such that cn(1,5) = cn(4,5) <= cn(0,5) = cn(2,5) = cn(3,5).at n=11A036889
- Numerators of continued fraction convergents to sqrt(298).at n=6A041560
- a(n)=(s(n)+4)/9, where s(n)=n-th base 9 palindrome that starts with 5.at n=31A043076
- Numbers whose base-5 representation contains exactly two 1's and three 4's.at n=13A045258
- Let (u1,u2) be successive untouchable numbers such that phi(u1) = phi(u2); sequence gives values of u1.at n=14A048189
- a(n) = floor((1/2 * (sqrt(2) + 1 + sqrt(2*sqrt(2) - 1)))^n ).at n=13A050243
- Starting positions of strings of 2 6's in the decimal expansion of Pi.at n=30A050245
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 20.at n=28A051985
- Fifth spoke of a hexagonal spiral.at n=35A056109
- Values of k for which A065358(k) is 0.at n=35A064940