Properties of the Number -8080

Eighty

Basics

Value: -8081 → -8080 → -8079

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ⁴ × 5 × 101

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111110010000

Octal: -17620

Duodecimal: -4814

Hexadecimal: -1f90

Square: 65286400

Square Root: 89.88882021697692

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

Octanacci numbers: a(0)=a(1)=...=a(6)=0, a(7)=1; for n >= 8, a(n) = ∑_i=1..8 a(n-i). A79262

Triangle of polynomial coefficients related to the series expansions of (1-x)^(-1-2·n/2). A161198

Differences of two positive 4th powers. A147857

a(n) = n*(2 + 5·n). A168668

Numbers whose base 10 digits are a subset of {0, 8}. A204095

Number of partitions of n into 3-smooth parts. A105420

Number of polygons formed outside a regular n-gon when every pair of vertices of the n-gon are joined by an infinite line. A344311

Numbers whose digits all belong to the same residue class mod 8. A385297

Numbers whose consecutive digits differ by 8. A48410

Number of nonnegative solutions to (x₁)² + (x₂)² + ... + (x₇)² <= n. A341402