Properties of the Number 28178

Twenty-Eight Thousand One Hundred Seventy-Eight

Basics

Value: 28177 → 28178 → 28179

Parity: even

Prime: No

Previous Prime: 28163

Next Prime: 28181

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 73 × 193

Divisors: 1, 2, 73, 146, 193, 386, 14089, 28178

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111000010010

Octal: 67022

Duodecimal: 14382

Hexadecimal: 6e12

Square: 793999684

Square Root: 167.86303941010956

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

Meandric numbers for a river crossing up to 12 parallel roads at n points. A209656

Meandric numbers for a river crossing any number of parallel roads at n points. A206432

Meandric numbers for a river crossing up to 13 parallel roads at n points. A209657

Meandric numbers for a river crossing up to 14 parallel roads at n points. A209660

Meandric numbers for a river crossing up to 15 parallel roads at n points. A209707

Meandric numbers for a river crossing up to 16 parallel roads at n points. A210344

Meandric numbers for a river crossing up to 17 parallel roads at n points. A210478

Meandric numbers for a river crossing up to 18 parallel roads at n points. A210567

Meandric numbers for a river crossing up to 19 parallel roads at n points. A210592

a(n) = ∑_{k=0..floor(n/2)} (-1)^k * binomial(n-1-k,k) * binomial(2·n-4·k,n-2·k). A360293