Properties of the Number -2439

Four Hundred Thirty-Nine

Basics

Value: -2440 → -2439 → -2438

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 271

Divisors: 1, 3, 9, 271, 813, 2439

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110000111

Octal: -4607

Duodecimal: -14B3

Hexadecimal: -987

Square: 5948721

Square Root: 49.38623289946298

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

(1,3) entry of powers of the orthogonal design shown in A090592. A89181

Let b(n) = A112455(n). Then b(n)/n is an integer iff n is prime (at least for the first few values, as for the Perrin sequence). This sequence is the values of b(p)/p, where p is the n th prime. A112458

Partial sums of Catalan numbers A000108 multiplied by powers of -8. A113267

A triangle sequence of polynomial coefficients:p(x,n)=Sum[Eulerian[n+1, k]*(-x)^k*Sum[StirlingS2[n, m]*x^m, {m, 0, n - k}], {k, 0, n}]. A174860

Number of partitions of n into parts having a common factor. A18783

Numbers whose binary expansion generates rotationally symmetric XOR-triangles. A334556

Least k such that decimal representation of k·n contains only digits 0 and 9. A96688

Expansion of g.f.: x⁴/((1-x)*(1-x²)²*(1-x³)). A8763

a(n) = 90·n - 81. A139280

Number of integer partitions y of n such that y_i = y_i+1 for all even i. A351003