Properties of the Number -28544

Twenty-Eight Thousand Five Hundred Forty-Four

Basics

Value: -28545 → -28544 → -28543

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁷ × 223

Divisors: 1, 2, 4, 8, 16, 32, 64, 128, 223, 446

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111110000000

Octal: -67600

Duodecimal: -14628

Hexadecimal: -6f80

Square: 814759936

Square Root: 168.949696655543

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

McKay-Thompson series of class 10B for the Monster group with a(0) = -4. A132040

G.f.: ∏_i>0 1/(∑_j>=0 j!*x^j·i). A293251

McKay-Thompson series of class 10B for the Monster group with a(0) = 0. A58098

a(n) = 4ⁿ cos(nC), where C is the angle opposite side AB in a triangle ABC having sidelengths |BC|=2, |CA| = 3, |AB| = 4; ABC is the smallest integer-sided scalene triangle. A375882

Abundant numbers n for which the abundance d = σ(n) - 2·n is a proper divisor, that is, 0 < d < n and d | n. A181595

Numbers with abundance 32. A175989

Numbers k such that σ(k) = σ(k+10). A15880

Abundant numbers n such that n/(σ(n)-2n) is an integer. A153501

Near-perfect numbers (A181595) of the form 2^t-1*(2^t-2^k-1), where 2^t-2^k-1 is prime, k>=1, t>k. A181701

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 6 (6 maximizes T(1,1)). A233682