Properties of the Number 26847

Twenty-Six Thousand Eight Hundred Forty-Seven

Basics

Value: 26846 → 26847 → 26848

Parity: odd

Prime: No

Previous Prime: 26839

Next Prime: 26849

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 157

Divisors: 1, 3, 9, 19, 57, 157, 171, 471, 1413, 2983

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100011011111

Octal: 64337

Duodecimal: 13653

Hexadecimal: 68df

Square: 720761409

Square Root: 163.8505416530565

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Number of edges formed by sides and straight "chords" in a right triangle when each side is divided by vertices into n equal segments. A274586

Triangle T(n,k) = (2·n-k-1)*T(n-1,k-1) + (k+1)*T(n-1,k), with T(n,1) = T(n,n) = 1, 1 <= k <= n, read by rows. A156139

a(n) is the smallest k which satisfies (j² + k)/(j + k²) = n where j,k are integers and j >= k > 0. A290333

a(n) = 1 - (5/6)*n + (5/2)*n² + (10/3)*n³ + n⁴. A57675

Antiharmonic numbers using anti-divisors: numbers n such that σ*(n) divides σ*_2(n), where σ*(n) is the sum of anti-divisors of n and σ*_2(n) the sum of squares of anti-divisors of n. A192286

Composite numbers whose multiplicative persistence is 6. A199996

Ulam numbers k such that k/3 is also an Ulam number. A287212

Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of edges in the resulting planar graph. A367324

a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+1)/2 ], T given by A026725. A26847