Properties of the Number 28047

Twenty-Eight Thousand Forty-Seven

Basics

Value: 28046 → 28047 → 28048

Parity: odd

Prime: No

Previous Prime: 28031

Next Prime: 28051

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 9349

Divisors: 1, 3, 9349, 28047

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110110001111

Octal: 66617

Duodecimal: 14293

Hexadecimal: 6d8f

Square: 786634209

Square Root: 167.4723857834479

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) = floor(n*φ¹⁹), where φ is the golden ratio, A001622. A4934

Triangle T(n, k, j) = T(n-1, k, j) + T(n-1, k-1, j) + (2·j + 1)*prime(j)*T(n-2, k-1, j) with T(2, k, j) = prime(j) and j = 10, read by rows. A153655

Fibonacci sequence beginning 3, 9. A22379

Number of (w,x,y,z) with all terms in {1,...,n} and w²>=x·y*z. A212064

Numbers k such that 10⁹⁹⁹ + k is a (titanic) prime. A74282

Array of coefficients of characteristic polynomials of M_n, the n X n matrix with entries m_i,j = i mod j. A78924

Decimal representation of the n-th iteration of the "Rule 62" elementary cellular automaton starting with a single ON (black) cell. A266810

G.f. A(x) satisfies A(x) = 1 + x/(1+x²)² * A(x)³. A390170

a(n) = round(n*φ¹⁹), where φ is the golden ratio, A001622. A4954

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 0, 1)}. A150320