2038
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3060
- Proper Divisor Sum (Aliquot Sum)
- 1022
- 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
- 1018
- Möbius Function
- 1
- Radical
- 2038
- Omega Function (Ω)
- 2
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 63
- Smith Number
- yes
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Number of unlabeled Euler graphs with n nodes; number of unlabeled two-graphs with n nodes; number of unlabeled switching classes of graphs with n nodes; number of switching classes of unlabeled signed complete graphs on n nodes; number of Seidel matrices of order n.at n=8A002854
- Number of nonisomorphic 2-graphs with n nodes with first and second cohomology invariants both 0.at n=8A006627
- Patterns in a dual ring.at n=11A007574
- Coordination sequence T2 for Zeolite Code BOG.at n=32A008050
- Coordination sequence T3 for Zeolite Code PAU.at n=33A008221
- Coordination sequence T4 for Zeolite Code PAU.at n=33A008222
- Numerator of the coefficient of [x^(2n)] of the Taylor series log(cosec(x)*arctanh(x)).at n=4A012861
- Numbers k such that the continued fraction for sqrt(k) has period 74.at n=0A020413
- Coordination sequence T2 for Zeolite Code MWW.at n=30A024987
- a(n) = T(n,n-2), where T is the array in A026386.at n=42A026393
- Coordination sequence T2 for Zeolite Code ITE.at n=31A027370
- 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 44.at n=7A031542
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 38 ones.at n=0A031806
- "EFK" (unordered, size, unlabeled) transform of 2,4,6,8,...at n=11A032309
- Numbers k such that 19*2^k+1 is prime.at n=5A032359
- Position of first occurrence of n in the continued fraction for the Euler-Mascheroni constant (gamma).at n=33A033149
- Trajectory of 1 under map n->25n+1 if n odd, n->n/2 if n even.at n=6A033969
- Digit sum of composite even number equals digit sum of juxtaposition of its prime factors (counted with multiplicity).at n=47A036924
- Coordination sequence T2 for Zeolite Code AFN.at n=32A038402
- Coordination sequence T4 for Zeolite Code STT.at n=30A038417