Properties of the Number -6440

Four Hundred Forty

Basics

Value: -6441 → -6440 → -6439

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 5 × 7 × 23

Divisors: 1, 2, 4, 5, 7, 8, 10, 14, 20, 23

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100100101000

Octal: -14450

Duodecimal: -3888

Hexadecimal: -1928

Square: 41473600

Square Root: 80.24961059095551

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

Expansion of e.g.f. log(1 + arcsin(x))*exp(x). A296436

A transform of the Fibonacci numbers. A99505

Rhombic matchstick numbers: a(n) = n*(3·n+2). A45944

a(n) = n*(4·n+1). A7742

Minimal (positive) solution a(n) of Pell equation b(n)² - D(n)*a(n)² = +4 with D(n)= A077425(n). The companion sequence is a(n)=A077428(n). A78355

Triangle T(n,k) of the number of strongly connected digraphs on n labeled nodes and with k arcs, k=0..n*(n-1). A57273

a(n) = 2·n*(4·n + 3). A33587

Triangle related to the asymptotic expansion of E(x,m=4,n). A163934

Numbers k such that k!!!! + 1 is prime. A85146

Perimeter of primitive integer-sided triangles with A < B < C < 2*π/3 and such that FA + FB + FC is an integer where F is the Fermat point of the triangle. A336333