2763
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 4004
- Proper Divisor Sum (Aliquot Sum)
- 1241
- 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
- 1836
- Möbius Function
- 0
- Radical
- 921
- Omega Function (Ω)
- 3
- 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
- 40
- 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
- no
- Odd
- yes
Appears in sequences
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=49A000232
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=48A000232
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=46A000232
- Construct a triangle as in A036262. Sequence is one less than the position of the first number larger than 2 in the n-th row (n-th difference).at n=47A000232
- Expansion of cos(x)/cos(2x).at n=3A000281
- Generalized class numbers c_(n,3).at n=1A000508
- Expansion of cos x (1 + sin x ) /cos 2x.at n=6A000825
- Generalized Euler numbers, or Springer numbers.at n=6A001586
- Numbers that are the sum of 12 positive 6th powers.at n=45A003368
- Molien series for A_6.at n=36A008629
- Multiplicity of trivial character in V_n, where V = Sum V_n is the graded module for the Monster simple group.at n=31A014810
- a(n) = n*(17*n + 1)/2.at n=18A022275
- Numbers k such that Fib(k) == -34 (mod k).at n=22A023169
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=17A025405
- Numbers that are the sum of 4 positive cubes in 3 or more ways.at n=19A025407
- Coordination sequence T4 for Zeolite Code ITE.at n=36A027372
- Numbers k such that in k and k^2 the parity of digits alternates.at n=26A030153
- 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 51.at n=18A031549
- Lucky numbers with size of gaps equal to 8 (upper terms).at n=30A031891
- Lucky numbers with size of gaps equal to 10 (lower terms).at n=28A031892