Properties of the Number -19128

Nineteen Thousand One Hundred Twenty-Eight

Basics

Value: -19129 → -19128 → -19127

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 797

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 797, 1594

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100101010111000

Octal: -45270

Duodecimal: -B0A0

Hexadecimal: -4ab8

Square: 365880384

Square Root: 138.30401295696376

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

Number of reduced words of length n in Coxeter group on 3 generators S_i with relations (S_i)² = (S_i S_j)⁶ = I. A163876

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237557

G.f.: exp( ∑_n>=1 xⁿ/n * ∏_d∣n (1 + d·xⁿ)^d ). A205482

Number of subsets of {1..n} with the same number of maximal runs (increasing by 1) as maximal anti-runs (increasing by more than 1). A385572

Number of permutations in S_n avoiding {bar 1}3425 (i.e., every occurrence of 3425 is contained in an occurrence of a 13425). A137542

a(n) = 2ⁿ+n³. A97339

Numbers k such that 2·10^k + 5·R_k + 2 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A99006

Number of (n+1) X (1+1) 0..2 arrays with the maximum minus the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. A237550

Number of (n+1)X(5+1) 0..2 arrays with the maximum minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237554

a(n) = A330575(A025487(n)). A333962