Properties of the Number -28549

Twenty-Eight Thousand Five Hundred Forty-Nine

Basics

Value: -28550 → -28549 → -28548

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 28549

Divisors: 1, 28549

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111110000101

Octal: -67605

Duodecimal: -14631

Hexadecimal: -6f85

Square: 815045401

Square Root: 168.9644933114647

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) = ∑_{1 <= x₁, x₂, x₃ <= n} n/gcd(x₁, x₂, x₃, n). A372952

Triangle T(n, k) = T(n-1, k) + T(n-1, k-1) + ((n+1)*(n+2)/2)*T(n-2, k-1), read by rows. A154227

Numbers b > 1 such that the smallest four primes, i.e., 2, 3, 5 and 7 are base-b Wieferich primes. A339533

Primes p such that p and p² have same digit sum. A58370

Primes p such that p-2 and q are primes, where q is concatenation of binary representations of p and p-2: q = p·2^L + p-2, where L is the length of binary representation of p-2: L=A070939(p-2). A232237

Number of length-4 0..n arrays with no adjacent pair x,x+1 repeated. A269657

Primes of the form p^k - p + 1 for prime p. A34915

Primes p such that 2·p + 23 is a square. A269785

Twin primes both of which are the sum of three positive cubes. A272376

Primes that can be generated by the concatenation in base 3, in ascending order, of two consecutive integers read in base 10. A287300