Properties of the Number -19490

Nineteen Thousand Four Hundred Ninety

Basics

Value: -19491 → -19490 → -19489

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 1949

Divisors: 1, 2, 5, 10, 1949, 3898, 9745, 19490

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110000100010

Octal: -46042

Duodecimal: -B342

Hexadecimal: -4c22

Square: 379860100

Square Root: 139.60659010233005

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) = ∑_{k=0..floor(n/5)} (-1)^k * binomial(n-4·k,k) * Catalan(k). A360027

Partial sums of A299283. A299284

a(n) = ∑_i=1..n C(i+4,5)². A86025

a(n) is the smallest index k such that ∑_m=1..k 1/z(m) > n where z(m) is the imaginary part of the m-th nontrivial zero of the Riemann ζ function, n=0,1,2,... A332614

Numbers that are the sum of six fourth powers in exactly four ways. A345816

Number of perfect rhythmic tilings of [0,4n-1] with quadruplets. A261517

Denominators of continued fraction convergents to sqrt(157). A41289

a(n) = floor(n!/2ⁿ). A66979

Number triangle of sums of squared binomial coefficients. A110197

Expansion of f(-x³, -x⁷) * f(x⁴, x⁶) / ψ(-x)² in powers of·where ψ(), f(,) are Ramanujan θ functions. A259393