1982
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2976
- Proper Divisor Sum (Aliquot Sum)
- 994
- 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
- 990
- Möbius Function
- 1
- Radical
- 1982
- 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
- 99
- Smith Number
- no
- 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
- Euler transform of A000332.at n=6A000391
- Atom-rooted polyenoids with n edges with symmetry class C_s.at n=8A000908
- Number of points on y^2 + xy = x^3 + x^2 + x over GF(2^n).at n=10A002248
- Sets with a congruence property.at n=13A002703
- Number of (undirected) Hamiltonian paths in the n-ladder graph K_2 X P_n.at n=44A003682
- Coordination sequence for Paracelsian.at n=30A008260
- Coordination sequence T1 for Zeolite Code RSN.at n=29A009885
- Coordination sequence T5 for Zeolite Code RSN.at n=29A009889
- Coordination sequence for CaF2(1), Ca position.at n=15A009923
- a(n) = n^2 + n + 2.at n=44A014206
- a(n) = 2^n - n*(n+1)/2.at n=11A014833
- Numbers k such that the continued fraction for sqrt(k) has period 24.at n=30A020363
- Coordination sequence T3 for Zeolite Code IFR.at n=31A024984
- Index of 8^n within the sequence of the numbers of the form 3^i*8^j (A025615).at n=45A025728
- 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=4A031542
- Multiplicity of highest weight (or singular) vectors associated with character chi_9 of Monster module.at n=35A034397
- Number of partitions of n with equal nonzero number of parts congruent to each of 0, 1 and 4 (mod 5).at n=47A035584
- Denominators of continued fraction convergents to sqrt(469).at n=6A041895
- Numerators of continued fraction convergents to sqrt(519).at n=7A041992
- Numbers k such that 2 and 8 occur juxtaposed in the base-10 representation of k but not of k-1.at n=39A043238