Properties of the Number -3805

Eight Hundred Five

Basics

Value: -3806 → -3805 → -3804

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 5 × 761

Divisors: 1, 5, 761, 3805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111011011101

Octal: -7335

Duodecimal: -2251

Hexadecimal: -edd

Square: 14478025

Square Root: 61.68468205316454

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+3) = 6·a(n) - 5·a(n+2), a(0) = 1, a(1) = -7, a(2) = 35. A110213

Determinant of the (p_n-1)/2 X (p_n-1)/2 matrix with (i,j)-entry being the Legendre symbol ((j-i)/p_n), where p_n is the n-th prime. A228077

Number of unlabeled rooted semi-identity trees with n nodes. A306200

Numbers n such that the decimal expansions of both n and n² have 0 as smallest digit and 8 as largest digit. A256708

Number of partitions of n such that (greatest part) - (least part) = number of parts. A237832

Partial sums of gcd-sum sequence A018804. A272718

T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4. A239405

O.g.f. A(x) satisfies: 0 = [xⁿ] exp( n² * Integral A(x)² dx ) / A(x), for n > 0. A305139

Path-counting triangular array T(i,j), read by rows, obtained from array t in A038792 by T(i,j) = t(2·i-j, j) (for i >= 1 and 1 <= j <= i). A38730

Number of polyhexes of class PF2. A30534