6408
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
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 17550
- Proper Divisor Sum (Aliquot Sum)
- 11142
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2112
- Möbius Function
- 0
- Radical
- 534
- Omega Function (Ω)
- 6
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 62
- 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
- From rook polynomials.at n=9A001925
- Number of set-like atomic species of degree n.at n=38A007650
- Sum of squares of the first n primes.at n=12A024450
- Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 20.at n=7A031698
- For each prime p take the sum of nonprimes < p.at n=30A045717
- a(n) = 2^(n-1)*(8*n-14) + 8.at n=8A048501
- a(n) = 100*n^2 + n.at n=7A055438
- Numbers k such that phi(x) = k has exactly 12 solutions.at n=23A060675
- Smallest member of triple of consecutive numbers each of which is the sum of two different nonzero squares.at n=33A064715
- Smallest member of three consecutive numbers each of which is the sum of two nonzero squares (not necessarily different).at n=39A064716
- Numbers with no zeros in their cubes such that the products of the digits of their cubes are also cubes.at n=44A067071
- Lesser of three consecutive nonsquare integers each of which is the sum of two squares.at n=32A073412
- a(1)=1, then a(n)=2*a(n-1) if a(n-1) is prime, a(n)=a(n-1)+1 otherwise.at n=42A080735
- a(n) = Sum_{2 <= p <= n, p prime} p^2.at n=41A081738
- a(n) = Sum_{2 <= p <= n, p prime} p^2.at n=40A081738
- a(1)=1, a(n)=2a(n-1)+1 if a(n-1) is prime, a(n)=a(n-1)+1 otherwise.at n=31A083005
- Number of ways to label the vertices of the octahedron (or faces of the cube) with nonnegative integers summing to n, where labelings that differ only by rotation or reflection are considered the same.at n=28A097513
- Triangle, read by rows, of coefficients in powers of e.g.f. for A100076 such that, for each row n>=0, Sum_{k=0..n} T(n,k)/k! = [sqrt(5)^n].at n=27A100075
- Numbers n such that the sum of the digits of phi(n)^n is divisible by n.at n=9A109661
- Numbers k such that k^2 is a palindrome when written in base 17.at n=32A118651