2938
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4788
- Proper Divisor Sum (Aliquot Sum)
- 1850
- 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
- 1344
- Möbius Function
- -1
- Radical
- 2938
- 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
- 48
- 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
- yes
- Odd
- no
Appears in sequences
- Erroneous version of A002572.at n=16A001180
- Number of partitions of 1 into n powers of 1/2; or (according to one definition of "binary") the number of binary rooted trees.at n=16A002572
- Number of unrooted triangulations of the disk with n interior nodes and 3 nodes on the boundary.at n=7A002713
- Number of self-avoiding polygons of length 2n on square lattice (not allowing rotations).at n=7A002931
- a(n) = n*(n + 1)*(n^2 - 3*n + 5)/6.at n=12A006484
- General partition graphs on n vertices.at n=8A007269
- 12-gonal (or dodecagonal) pyramidal numbers: a(n) = n*(n+1)*(10*n-7)/6.at n=12A007587
- Coordination sequence T1 for Zeolite Code DDR.at n=34A008071
- Coordination sequence T1 for Zeolite Code -WEN.at n=39A009862
- a(n) = floor(n*(n - 1)*(n - 2)/31).at n=46A011913
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RTE = RUB-3 [Si24O48].2R starting with a T1 atom.at n=11A019225
- Expansion of x^2*(2 - x + x^2) / ((1 + x)*(1 - x)^4).at n=24A026035
- Concatenation of n and n + 9 or {n,n+9}.at n=28A032614
- Number of points of L1 norm 3 in cubic lattice Z^n.at n=13A035597
- Coordination sequence for 13-dimensional cubic lattice.at n=3A035708
- a(n)=number of Gaussian integers z=a+bi satisfying |z|<=n, b>=0.at n=43A036695
- Numbers n such that string 3,8 occurs in the base 10 representation of n but not of n-1.at n=32A044370
- Numbers n such that string 3,8 occurs in the base 10 representation of n but not of n+1.at n=32A044751
- Composite numbers whose 3 prime factors are distinct in length.at n=11A046443
- 1/2-Smith numbers.at n=20A050224