Properties of the Number 28649

Twenty-Eight Thousand Six Hundred Forty-Nine

Basics

Value: 28648 → 28649 → 28650

Parity: odd

Prime: Yes

Previous Prime: 28643

Next Prime: 28657

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 28649

Divisors: 1, 28649

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110111111101001

Octal: 67751

Duodecimal: 146B5

Hexadecimal: 6fe9

Square: 820765201

Square Root: 169.26015479137433

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

Primes that are the difference of two Fibonacci numbers; primes in A007298. A113188

a(n) = Fibonacci(n+6) - Fibonacci(6). A180671

Largest prime immediately preceding a Fibonacci number. A180422

Primes arising in A096847. A96848

Primes p such that p + 8, p + 12 and p + 20 are also primes. A384299

Numerator of 2·Sum(C(n,w)/w,w=1..n/2-1)+C(n,n/2)/(n/2) if n is even otherwise of 2·Sum(C(n,w)/w,w=1..(n-1)/2). A85571

Primes that are the difference between a fourth power and a positive cube. A161735

Expansion of (theta₃(z)*theta₃(21z) + theta₂(z)*theta₂(21z)). A28649

Denominator of 2·Sum(C(n,w)/w,w=1..n/2-1)+C(n, n/2)/(n/2) if n is even otherwise of 2·Sum(C(n,w)/w,w=1..(n-1)/2). A85572