2662
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- yes
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 4392
- Proper Divisor Sum (Aliquot Sum)
- 1730
- 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
- 1210
- Möbius Function
- 0
- Radical
- 22
- Omega Function (Ω)
- 4
- 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
- 53
- 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
- Squares written in base 7.at n=31A002440
- Numbers of the form 2^i * 11^j.at n=26A003596
- Powers of 2 written in base 7.at n=10A004646
- Powers of 2 written in base 15. (Next term contains a non-decimal character.)at n=13A004654
- G.f.: 2*(1-x^3)/((1-x)^5*(1+x)^2).at n=20A005996
- Coordination sequence T2 for Zeolite Code ATT.at n=37A008042
- Coordination sequence T4 for Zeolite Code MFS.at n=32A008176
- Positive integers k such that k-th triangular number is palindromic.at n=17A008509
- Numbers k such that both k and the k-th triangular number are palindromes.at n=7A008510
- Coordination sequence T2 for Zeolite Code -PAR.at n=37A009856
- arctanh(tan(x)*exp(x))=x+2/2!*x^2+7/3!*x^3+36/4!*x^4+285/5!*x^5...at n=6A012363
- Denominator of sum of -3rd powers of divisors of n.at n=21A017670
- Numbers k such that the continued fraction for sqrt(k) has period 54.at n=5A020393
- Theta series of A*_10 lattice.at n=20A023922
- a(n+1) = a(n) + a(n-1) + Fibonacci(n), with a(0) = 0 and a(1) = 1.at n=14A029907
- 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 50.at n=15A031548
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=20A031792
- Numbers k whose decimal representation, read as a base-21 value and divided by k, yields an integer.at n=24A032573
- a(n) = 2*n^3.at n=11A033431
- Coordination sequence T3 for Zeolite Code SBS.at n=41A033610