Properties of the Number -28665

Twenty-Eight Thousand Six Hundred Sixty-Five

Basics

Value: -28666 → -28665 → -28664

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 7 ² × 13

Divisors: 1, 3, 5, 7, 9, 13, 15, 21, 35, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110111111111001

Octal: -67771

Duodecimal: -14709

Hexadecimal: -6ff9

Square: 821682225

Square Root: 169.30741271426953

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

The non-repetitive Kaprekar binary numbers in decimal. A163205

Denominator of the average height of a binary search tree on n elements. A195583

Coefficient of x⁶ in expansion of (1+x+x²)ⁿ. A5714

a(n) is the least integer that can be expressed as the difference of two hexagonal numbers in exactly n ways. A334035

Smallest number having exactly n divisors of the form 8·k + 5. A343106

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+16807)² = y². A118576

Third Moebius transform of A000219. Number of plane partitions of n whose multiset of rows is aperiodic and whose multiset of columns is also aperiodic and whose parts are relatively prime. A323585

Row 3 of array in A047666. A47667

Numbers that are divisible by the squares of two distinct primes and whose arithmetic derivative (A003415) is a squarefree number of the form 4k+2. A368697

Numbers k such that k and k² use only the digits 1, 2, 5, 6 and 8. A137005