Properties of the Number 28671

Twenty-Eight Thousand Six Hundred Seventy-One

Basics

Value: 28670 → 28671 → 28672

Parity: odd

Prime: No

Previous Prime: 28669

Next Prime: 28687

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 19 × 503

Divisors: 1, 3, 19, 57, 503, 1509, 9557, 28671

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111111111

Octal: 67777

Duodecimal: 14713

Hexadecimal: 6fff

Square: 822026241

Square Root: 169.32513103494117

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

Numbers k such that there is 1 prime between 100·k and 100·k + 99. A186393

a(n) = 7·2ⁿ - 1. A86224

a(n) = ∑_{k=0..floor(n/2)} A026615(n, k). A26623

Number of points of norm <= n in cubic lattice. A605

Numbers of the form i·8^j-1 (i=1..7, j >= 0). A165804

a(n) = (n+3)*2ⁿ - 1. A6589

Bases in which 7 is a unique-period prime. A306075

a(n) = Fibonacci(n) OR Fibonacci(n+1). A51123

Construct sequences P,Q,R by the rules: Q = first differences of P, R = second differences of P, P starts with 1,3,9, Q starts with 2,6, R starts with 4; at each stage the smallest number not yet present in P,Q,R is appended to R. Sequence gives P. A225385

Positions of records in A249695. A249715