Properties of the Number 28746

Twenty-Eight Thousand Seven Hundred Forty-Six

Basics

Value: 28745 → 28746 → 28747

Parity: even

Prime: No

Previous Prime: 28729

Next Prime: 28751

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 1597

Divisors: 1, 2, 3, 6, 9, 18, 1597, 3194, 4791, 9582

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000001001010

Octal: 70112

Duodecimal: 14776

Hexadecimal: 704a

Square: 826332516

Square Root: 169.5464538113375

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

a(n) = (n+1)*F(n), F(n) = Fibonacci numbers A000045. A99920

a(n) = σ(n)*Fibonacci(n), where σ(n) = A000203(n), the sum of divisors of n. A203848

Row sums of triangle A182700. A182704

Irregular triangle read by rows: row n consists of the coefficients in the expansion of the polynomial x*(x² - 2) + x*(((v - w)/2)ⁿ + ((v + w)/2)ⁿ), where v = 3 + 2·x and w = sqrt(5 + 4·x). A316659

Fibonacci sequence beginning 0, 18. A22352

a(n) = Fibonacci(n) + Fibonacci(2n+1). A87124

Coefficients of a generalized Jaco-Lucas polynomial (even indices) read by rows. A122076

Number of partitions of floor(5n/2)-1 into n nonnegative integers each no more than 5. A1976

Expansion of 1/((x-1)*(x+1)*(x²+x+1)*(x²+x-1)*(x²-x+1)*(x²+1)*(x⁴-x²+1)). A109609

a(n) = Fibonacci(n-1) + prime(n). A113753