Properties of the Number -26

Twenty-Six

Basics

Value: -27 → -26 → -25

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 2 × 13

Divisors: 1, 2, 13, 26

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11010

Octal: -32

Duodecimal: -22

Hexadecimal: -1a

Square: 676

Square Root: 5.0990195135927845

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

Abundance of n, or (sum of divisors of n) - 2n. A33880

Canonical enumeration of integers: interleaved positive and negative integers with zero prepended. A1057

a(0) = 0; thereafter a(n) is the least integer (in absolute value) not yet in the sequence such that the absolute difference between a(n-1) and a(n) is a square; in case of a tie, preference is given to the positive value. A377091

a(n) = 2 - n. A22958

a(n) = 2*φ(n) - n. A83254

Balanced ternary enumeration (based on balanced ternary representation) of integers; write n in ternary and then replace 2's with (-1)'s. A117966

a(0)=0; thereafter a(2n) = 2a(n), a(2n+1) = -2a(n) + 1. A65620

A permutation of the integers: a(n) = (-1)ⁿ * floor( (n+1)/2 ). A130472

a(n) = (-1)ⁿ⁺¹ * n. A181983

The bottom entry in the difference table of the divisors of n. A187202