3857
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
- 8
- Divisor Sum
- 4800
- Proper Divisor Sum (Aliquot Sum)
- 943
- 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
- 3024
- Möbius Function
- -1
- Radical
- 3857
- 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
- 51
- 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
- no
- Odd
- yes
Appears in sequences
- Number of 6-dimensional partitions of n.at n=6A000416
- Number of starters in cyclic group of order 2n+1.at n=7A006204
- Coordination sequence T2 for Banalsite.at n=37A008250
- Coordination sequence T6 for Zeolite Code CON.at n=44A009873
- Expansion of e.g.f. of exp(arcsinh(x)/exp(x)).at n=8A013572
- a(n) = floor( Gamma(n+9/10)/Gamma(9/10) ).at n=7A020060
- a(n) is least k such that k and 2k are anagrams in base n (written in base 10).at n=27A023094
- Least k such that k and 4k are anagrams in base n (written in base 10).at n=25A023096
- Discriminants of quintic fields with 4 complex conjugates.at n=12A023685
- Shifts left 2 places under COMPOSE transform.at n=10A030277
- Exactly 5 digits from {1,2,3,4,5,6,7,8,9} can precede a(n) to form a prime.at n=35A032695
- Numbers whose set of base-15 digits is {1,2}.at n=21A032935
- Number of partitions of n with equal number of parts congruent to each of 0, 2 and 4 (mod 5).at n=46A035576
- Number of n-celled helicenes without holes.at n=9A038145
- Coordination sequence T4 for Zeolite Code SFF.at n=41A038434
- Numerators of continued fraction convergents to sqrt(331).at n=4A041624
- Numbers having three 5's in base 9.at n=7A043475
- Expansion of (Product_{j>=1} (1-(-x)^j) - 1)^19 in powers of x.at n=4A047644
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 20.at n=29A051985
- A000016-A000048 (when they are lined up so that the two 16's match).at n=50A053734