Properties of the Number 28718

Twenty-Eight Thousand Seven Hundred Eighteen

Basics

Value: 28717 → 28718 → 28719

Parity: even

Prime: No

Previous Prime: 28711

Next Prime: 28723

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 83 × 173

Divisors: 1, 2, 83, 166, 173, 346, 14359, 28718

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111000000101110

Octal: 70056

Duodecimal: 14752

Hexadecimal: 702e

Square: 824723524

Square Root: 169.4638604540803

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

G.f.: ∑_n>=0 xⁿ / (1-x²)^2·n+1 * [∑_k=0..n C(n,k)² * x^2·k]². A246563

G.f.: ∑_n>=0 xⁿ / (1-x)^4·n+3 * [∑_k=0..2·n+1 C(2·n+1,k)² * x^k]². A246571

a(n) = prime(n)*prime(n+1) - prime(n+1). A37167

Number of nondecreasing strings of numbers x(i=1..n) in -3..3 with sum x(i)³ equal to 0. A188271

Number of (n+2) X 9 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..1 introduced in row major order. A204753

Number of 6 X n 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. A301795

Number of nX3 0..1 arrays with every element unequal to 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A317866

G.f.: sqrt( ∑_n>=0 xⁿ / (1-x)^4·n+3 * [∑_k=0..2·n+1 C(2·n+1,k)² * x^k]² ). A246573

Expansion of (theta₃(z)*theta₃(7z)*theta₃(49z)+theta₂(z)*theta₂(7z)*theta₂(49z)). A28718