16470
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 32
- Divisor Sum
- 44640
- Proper Divisor Sum (Aliquot Sum)
- 28170
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4320
- Möbius Function
- 0
- Radical
- 1830
- Omega Function (Ω)
- 6
- Little Omega Function (ω)
- 4
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
- 115
- 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
- Fibonacci sequence beginning 0, 27.at n=15A022361
- Numbers whose base-4 representation contains exactly three 0's and four 1's.at n=20A045032
- Self-locating strings within Pi: numbers n such that the string n is at position n in the decimal digits of Pi, where the initial digit 3 is at position 0.at n=1A057680
- Numbers n such that phi(n+1) = 3*phi(n).at n=33A067143
- Triangle read by rows: T(n,k) is the number of dissections of a convex n-gon by nonintersecting diagonals, having a k-gon over a fixed edge (base).at n=48A091370
- Numbers whose set of base 7 digits is {0,6}.at n=25A097253
- Triangle, read by rows, such that row n equals the inverse binomial transform of row n of table A060543, where A060543(n,k) = C(n+n*k+k, n*k+k).at n=18A108290
- Triangle, read by rows, resulting from the matrix product of triangle A108267 with Pascal's triangle (A007318).at n=17A108291
- Fifth convolution of Schroeder's (second problem) numbers A001003(n), n>=0.at n=6A111993
- Record gaps between prime quadruplets.at n=11A113404
- Numbers k such that lambda(k) = lambda(k+1).at n=21A173695
- Number of (indecomposable or decomposable) Type II binary self-dual codes of length 8n with the highest minimal distance.at n=5A215219
- Numbers n such that n+(n+1), n^2+(n+1)^2, n+(n+1)^2, n^2+(n+1) are all prime.at n=24A216270
- a(n) = prime(n)^3 - prime(n^3).at n=9A262199
- Number of Dyck paths of semilength n such that the number of peaks in each positive level is a term of this sequence.at n=12A288390
- Number of length-n ternary words containing no even palindromes of length > 0 and no odd palindromes of length > 3.at n=21A330132
- Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords cross the marked chord.at n=16A336598
- Number of ways to write n as an ordered sum of 10 squares of positive integers.at n=43A340947
- Primitive terms of A108569.at n=18A346277
- Möbius transform of A341529, sigma(n) * A003961(n).at n=35A347125