Properties of the Number 40489

Forty Thousand Four Hundred Eighty-Nine

Basics

Value: 40488 → 40489 → 40490

Parity: odd

Prime: No

Previous Prime: 40487

Next Prime: 40493

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 19 × 2131

Divisors: 1, 19, 2131, 40489

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001111000101001

Octal: 117051

Duodecimal: 1B521

Hexadecimal: 9e29

Square: 1639359121

Square Root: 201.21878639928232

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

Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths ending at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 5, n >= 2. A214359

A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the pair of ratios 6/5 and 5/3 which generate two complementary musical harmonies, the Minor 3rd (6/5) and the Major 6th (5/3). A61919

Irregular array T(n,k) of the numbers of non-extendable (complete) non-self-adjacent simple paths ending at each of a minimal subset of nodes within a square lattice bounded by rectangles with nodal dimensions n and 8, n >= 2. A214375

Ceiling((π+e)ⁿ). A121838

a(1)=1. a(n) = a(n-1) + (sum of the terms, from among terms a(1) through a(n-1), which are coprime to sum{k=1 to n-1} a(k)). A131347

Triangle T(n,m), [x·A(x)]^m=sum(n>=m T(n,m)*xⁿ), where A(x) satisfies x·A(x)³= -(2·x*A(x)²+sqrt(1-4·x*A(x)²)-1)/(4·x*A(x)²+sqrt(1-4·x*A(x)²)-1). A188110

Number of nX3 0..1 arrays with every element equal to 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero. A298095

Denominators of the best rational approximations of log(6/5)/log(2). A328883

Continued fraction for sqrt(512). A40489