Properties of the Number -28085

Twenty-Eight Thousand Eighty-Five

Basics

Value: -28086 → -28085 → -28084

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 41 × 137

Divisors: 1, 5, 41, 137, 205, 685, 5617, 28085

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110110110101

Octal: -66665

Duodecimal: -14305

Hexadecimal: -6db5

Square: 788767225

Square Root: 167.5857989210303

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

Table T(n,k) = -2·T(n-1,k)+T(n-1,k+1) = T(n,k-4), 0<=n. A140287

Pentagonal numbers with prime indices. A116995

a(n) = n-1 for n <= 4, otherwise if n is even then a(n) = a(n-5)+2^n/2, and if n is odd then a(n) = a(n-1)+2^(n-3/2). A200310

Nearest integer to 24*(2ⁿ - 1)/n. A3138

Integer part of 24(2ⁿ-1)/n. A3176

Third left hand column of triangle A163940. A163943

Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 726", based on the 5-celled von Neumann neighborhood. A283818

Consecutive states of the linear congruential pseudo-random number generator for the Texas Instruments TI99 when started at 1. A384221

Pentagonal numbers (A000326) which are also centered square numbers (A001844). A254711

Number of aperiodic necklaces (Lyndon words) with k<=5 black beads and n-k white beads. A277629