Properties of the Number -28880

Twenty-Eight Thousand Eight Hundred Eighty

Basics

Value: -28881 → -28880 → -28879

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ⁴ × 5 × 19 ²

Divisors: 1, 2, 4, 5, 8, 10, 16, 19, 20, 38

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111000011010000

Octal: -70320

Duodecimal: -14868

Hexadecimal: -70d0

Square: 834054400

Square Root: 169.941166289984

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

a(n) = 20·n². A195322

a(n) is the cototient of n³. A53192

Wiener index of the prism graph Y_n on 2n nodes. A138179

Number of walks on square lattice. A5565

Expansion of (theta₃(z)*theta₃(19z) + theta₂(z)*theta₂(19z))⁴. A28644

Numbers n such that A083722(n) > 1 and A083722(n) occurs later in A083722. A293893

a(n) = 289·n² - 2·n. A158252

Triangle read by rows. T(n, k) = 2·Eulerian(n, k - 1) - binomial(n - 1, k - 1)* binomial(n, k - 1) / k. A174159

Alternating sum of octagonal pyramidal numbers. A269429

Octahedral torus number: a(n) = n² + 2*(∑_k=1..n-1 k²) - 2*(floor((n+1)/2)² + 2*(∑_{k=1..floor((n+1)/2)-1} k²)) + (1 - (-1)ⁿ)/2. A50442