3792
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 9920
- Proper Divisor Sum (Aliquot Sum)
- 6128
- 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
- 1248
- Möbius Function
- 0
- Radical
- 474
- Omega Function (Ω)
- 6
- 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
- 38
- 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
- Coordination sequence for hexagonal close-packing.at n=19A007899
- Coordination sequence T5 for Zeolite Code PAU.at n=45A008223
- Coordination sequence for tridymite, lonsdaleite, and wurtzite.at n=38A008264
- Coordination sequence for alpha-Nd, Position Nd1.at n=19A009948
- Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10).at n=33A017832
- Numbers k such that the decimal expansion of k^2 contains k as a substring.at n=19A018834
- Coordination sequence T6 for Zeolite Code MWW.at n=41A024991
- (d(n)-r(n))/5, where d = A026066 and r is the periodic sequence with fundamental period (0,3,1,0,1).at n=36A026068
- Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 9.at n=39A031412
- Every run of digits of n in base 15 has length 2.at n=25A033013
- Numbers whose base-15 expansion has no run of digits with length < 2.at n=40A033028
- Composite numbers k such that digits in k and in juxtaposition of prime factors of k are the same (apart from multiplicity).at n=7A035141
- Positive integers with more base-15 runs of even length than odd.at n=26A044841
- Numbers k such that decimal expansion of k^2 contains k as a substring and k does not end in 0.at n=7A046831
- Internal digits of n^2 include digits of n, n does not end in 0.at n=42A046833
- Internal digits of n^2 include digits of n as subsequence.at n=13A046834
- Internal digits of n^2 include digits of n as subsequence, n does not end in 0.at n=1A046835
- Internal digits of n^2 include digits of n as substring.at n=8A046836
- Internal digits of k^2 include digits of k as substring, k does not end in 0.at n=0A046837
- T(n,n), array T as in A047060.at n=8A047062