Properties of the Number 28223

Twenty-Eight Thousand Two Hundred Twenty-Three

Basics

Value: 28222 → 28223 → 28224

Parity: odd

Prime: No

Previous Prime: 28219

Next Prime: 28229

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 13 ² × 167

Divisors: 1, 13, 167, 169, 2171, 28223

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110111000111111

Octal: 67077

Duodecimal: 143BB

Hexadecimal: 6e3f

Square: 796537729

Square Root: 167.9970237831611

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) = 36n² - 1. A136017

Positive integers k such that there is no m different from k where both d(k) = d(m) and d(k+1) = d(m+1), where d(k) is the number of positive divisors of k. A161460

Positive numbers y such that y² is of the form x²+(x+167)² with integer x. A159777

a(n) = 64·n² - 1. A158684

Least common multiple of 7·n+1 and 7·n-1. A282286

Numbers k such that k, k+2, k+4 are of the form p²*q where p and q are distinct primes. A308735

Long leg of the only primitive Pythagorean triple whose inradius is the n-th odd prime and whose short leg is an even number. A367335

a(n) = 784·n - 1. A158399

Expansion of 1/(1 - ∑_k>=2 floor(1/ω(2·k-1))*x^2·k-1), where ω() is the number of distinct prime factors (A001221). A280200

Numbers of the form 16n² + 32n + 15 for which the central region of its symmetric representation of σ consists of two subparts of sizes 4n+7 and 4n+1, n>=0. A335574