Properties of the Number -1618

Six Hundred Eighteen

Basics

Value: -1619 → -1618 → -1617

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 809

Divisors: 1, 2, 809, 1618

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11001010010

Octal: -3122

Duodecimal: -B2A

Hexadecimal: -652

Square: 2617924

Square Root: 40.22437072223753

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 ∏_m>=1 (1 - m·q^m)². A22662

a(n) = A138906(n) - A138905(n). A138907

Numerator of Hermite(n, 4/29). A160231

Expansion of 1/(∑_k>=0 x^k³)². A363776

Y-toothpick sequence (see Comments lines for definition). A160120

Centered heptagonal numbers. A69099

Number of pairwise coprime strict compositions of n, where a singleton is not considered coprime unless it is (1). A337561

Number of free pure symmetric multifunctions in one symbol with n positions. A280000

|First digit - second digit + third digit - fourth digit ...| = 12. A60980

Coordination sequence for (2,5,7) tiling of hyperbolic plane. A265066