Properties of the Number 28807

Twenty-Eight Thousand Eight Hundred Seven

Basics

Value: 28806 → 28807 → 28808

Parity: odd

Prime: Yes

Previous Prime: 28793

Next Prime: 28813

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 28807

Divisors: 1, 28807

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000010000111

Octal: 70207

Duodecimal: 14807

Hexadecimal: 7087

Square: 829843249

Square Root: 169.72625017951702

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

Palindromic numbers in bases 2 and 8 written in base 10. A259380

Prime number spiral (clockwise, Southeast spoke). A54564

Primes p such that p+1, p+2 and p+3 have equal number of divisors. A119711

Primes of the form 3·m² - 5. A201717

Primes of the form 8·k² + 7. A201704

Lesser of Gridgeman pairs in base 8 in increasing order: pairs of primes palindromic in base 8 which differ only in their middle digits by a difference of 1. A246871

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 100 ones. A31868

Base-8 palindromes that start with 7. A43027

Numerator and denominator sums of convergents to the Thue-Morse constant, 0.412454033... A85396

Larger of two consecutive primes whose sum is a square. A118591