Properties of the Number 18404

Eighteen Thousand Four Hundred Four

Basics

Value: 18403 → 18404 → 18405

Parity: even

Prime: No

Previous Prime: 18401

Next Prime: 18413

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 43 × 107

Divisors: 1, 2, 4, 43, 86, 107, 172, 214, 428, 4601

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111100100

Octal: 43744

Duodecimal: A798

Hexadecimal: 47e4

Square: 338707216

Square Root: 135.66134305689297

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..n binomial(k+3,3) * binomial(2·k,2·n-2·k). A382470

Non-balanced numbers in A015771. A78549

G.f. A(x) satisfies A(x) = 1 + x·abs( 1/A(x) )². A380708

Spontaneous magnetization coefficients for square lattice spin 3/2 Ising model. A10105

G.f.: ∑_n>=0 (xⁿ + i)ⁿ / (1 + i·xⁿ)ⁿ⁺¹, in which the constant term is taken to be 1. A323689

Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected homeomorphically irreducible planar graphs with n nodes and k faces, k=4..2n-4. A378075

Spontaneous magnetization coefficients for square lattice spin 3/2 Ising model. A30120

a(n) = ∑_{k=0..floor(n/2)} T(n-k,k), T given by A026736. A26746

Triangle of coefficients of the primitive Eulerian polynomials of type D T(n,k) (n >= 2, 1 <= k <= n) read by rows. A363935

a(n) = ∏_i=n..n+4 A000045(i) mod ∑_i=n..n+4 A000045(i). A348914