Properties of the Number -3655

Six Hundred Fifty-Five

Basics

Value: -3656 → -3655 → -3654

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 17 × 43

Divisors: 1, 5, 17, 43, 85, 215, 731, 3655

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111001000111

Octal: -7107

Duodecimal: -2147

Hexadecimal: -e47

Square: 13359025

Square Root: 60.45659600076736

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 1/(1 - x*∏_k>=1 (1 - x^k)). A299105

Second right hand column of the β triangle A160480. A160483

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 339", based on the 5-celled von Neumann neighborhood. A271292

Hexagonal numbers: a(n) = n*(2·n-1). A384

Centered 9-gonal (also known as nonagonal or enneagonal) numbers. Every third triangular number, starting with a(1)=1. A60544

Bessel polynomial y_n(-1). A806

Triangle of Gaussian (or q-binomial) coefficients for q = -2. A15109

Generalized 26-gonal (or icosihexagonal) numbers: m*(12·m - 11) with m = 0, +1, -1, +2, -2, +3, -3, ... A316724

Number of loopless linear chord diagrams with n chords. A278990

a(n) = (2·n+1)*(4·n+1). A14634