Properties of the Number 28904

Twenty-Eight Thousand Nine Hundred Four

Basics

Value: 28903 → 28904 → 28905

Parity: even

Prime: No

Previous Prime: 28901

Next Prime: 28909

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 3613

Divisors: 1, 2, 4, 8, 3613, 7226, 14452, 28904

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000011101000

Octal: 70350

Duodecimal: 14888

Hexadecimal: 70e8

Square: 835441216

Square Root: 170.01176429882727

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) = ∑_d∣n (-1)^n/d-1 * binomial(d+3,4). A366814

a(n) = 10000·log(n) rounded to nearest integer. A4244

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 85. A31763

Number of lower triangles of a 3 X 3 0..n array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less. A195249

a(n) = ceiling(10000·log(n)). A4245

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 85. A31583

Map n = Sum c_i 10ⁱ to a(n) = Sum c_i 9ⁱ. A28904