3848
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
- 5
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 7980
- Proper Divisor Sum (Aliquot Sum)
- 4132
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1728
- Möbius Function
- 0
- Radical
- 962
- Omega Function (Ω)
- 5
- 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
- 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
- Prefix (or Levenshtein) codes for natural numbers.at n=24A010097
- arcsin(arcsinh(x)*tan(x))=2/2!*x^2+4/4!*x^4+230/6!*x^6+3848/8!*x^8...at n=3A012612
- Number of triples of different integers from [ 2,n ] with no common factors between pairs.at n=43A015620
- Numbers n such that n is a substring of its square in base 3 (written in base 10).at n=20A018827
- Least k such that k and 4k are anagrams in base n (written in base 10).at n=33A023096
- 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 31.at n=13A031529
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 31.at n=1A031709
- Numbers k such that 175*2^k+1 is prime.at n=18A032464
- Numbers each of whose runs of digits in base 12 has length 2.at n=29A033010
- Positive numbers having the same set of digits in base 6 and base 9.at n=22A037436
- Positive integers having more base-12 runs of even length than odd.at n=31A044838
- Coordination sequence T1 for Zeolite Code MSO.at n=43A047963
- Numbers n such that 269*2^n-1 is prime.at n=5A050893
- Triangular spiral sequence: sequence is written as a triangular spiral, each entry is the sum of the row in the previous direction containing the previous entry.at n=23A063177
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 80 ).at n=39A063353
- a(n) = floor(Pi*n^2).at n=35A066643
- Number of primes in the interval [p(n), p(n)^2] minus p(n), where p(n) is the n-th prime.at n=44A066883
- Number of labeled cyclic trees with n nodes such that the root is smaller than all its children.at n=4A071212
- a(n) = Pi * n^2 rounded off.at n=35A075726
- a(n) = (prime(n)^4 - 1) / 240.at n=7A089034