Properties of the Number -439

Four Hundred Thirty-Nine

Basics

Value: -440 → -439 → -438

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 439

Divisors: 1, 439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110111

Octal: -667

Duodecimal: -307

Hexadecimal: -1b7

Square: 192721

Square Root: 20.952326839756964

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) = prime(n)-n*τ(n) where τ(n) is the number of divisors of n. A67292

McKay-Thompson series of class 30G for the Monster group. A58618

G.f. satisfies x = A(x)*(1+A(x))/(1-A(x)-(A(x))²). A108624

Expansion of (1 - x)/(1 + x - x² + 2·x³). A78043

Expansion of q^-3/8* η(q)⁷* η(q⁴)²/ η(q²)³ in powers of q. A128713

Expansion of q^-1 * χ(-q)² * χ(-q¹⁵)² / (χ(-q³) * χ(-q⁵)) in powers of q where χ() is a Ramanujan θ function. A133098

a(n) = 1 if n=0, otherwise ∑_{k=0..floor((n-1)/2)} binomial(n-k-1, k) *(-1)^k*a(n-1-2k). A172385

Expansion of (1-5·x-x²+x³)/((1+x)*(1-x)³). A141354

G.f. satisfies: A(x) = exp( ∑_n>=1 A(-xⁿ)³ * xⁿ/n ). A200402

Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A203003; by antidiagonals. A203004