3698
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 5679
- Proper Divisor Sum (Aliquot Sum)
- 1981
- 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
- 1806
- Möbius Function
- 0
- Radical
- 86
- Omega Function (Ω)
- 3
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 69
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- a(n) = 2*n^2.at n=43A001105
- Coordination sequence T2 for Zeolite Code THO.at n=43A008239
- Numbers m such that phi(m) * sigma(m) + k^2 is not a square for any k.at n=21A015713
- Twelve iterations of Reverse and Add are needed to reach a palindrome.at n=18A015993
- Numbers having period-4 6-digitized sequences.at n=10A031197
- Size of lexicographic code of length n, Hamming distance 10 and weight 10.at n=34A031502
- 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=8A031558
- Dirichlet convolution of squares with themselves.at n=42A034714
- Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 3 (mod 5).at n=39A035569
- Number of partitions of n with equal number of parts congruent to each of 1, 2 and 4 (mod 5).at n=53A035579
- Coordination sequence for 43-dimensional cubic lattice.at n=2A035738
- Coordination sequence for C_43 lattice.at n=1A035780
- Numbers k such that tau(sigma(k)) = tau(k) where tau(k) is the number of divisors of k and sigma(k) their sum.at n=40A037197
- Number of partitions satisfying cn(1,5) + cn(4,5) <= cn(2,5) and cn(1,5) + cn(4,5) <= cn(3,5).at n=38A039876
- a(n)=(s(n)+1)/8, where s(n)=n-th base 8 palindrome that starts with 7.at n=32A043071
- Coordination sequence T2 for Zeolite Code AEN.at n=38A047951
- Numbers that are not squarefree and whose Euler totient function is squarefree.at n=14A049198
- A Diaconis-Mosteller approximation to the Birthday problem function.at n=20A050255
- Numbers n such that n^3 is the sum of two nonzero squares in exactly one way.at n=26A050804
- Numbers n such that n^2 contains exactly 8 different digits.at n=6A054036