Properties of the Number 40782

Forty Thousand Seven Hundred Eighty-Two

Basics

Value: 40781 → 40782 → 40783

Parity: even

Prime: No

Previous Prime: 40771

Next Prime: 40787

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 7 × 971

Divisors: 1, 2, 3, 6, 7, 14, 21, 42, 971, 1942

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1001111101001110

Octal: 117516

Duodecimal: 1B726

Hexadecimal: 9f4e

Square: 1663171524

Square Root: 201.94553721238805

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

Egyptian fraction representation of sqrt(99) (A010550) using a greedy function. A248322

Lexicographically earliest unbounded aliquot-like sequence based on the Dedekind ψ function: a(1) = 318, a(n) = t(a(n-1)) where t(k) = A001615(k) - k. A323328

Aliquot sequence starting at 966. A14363

Expansion of φ(-x⁵) * f(x², x⁸) / ψ(-x)² in powers of·where φ, ψ, f(,) are Ramanujan θ functions. A259392

Number of nondecreasing arrangements of 6 numbers in -(n+4)..(n+4) with sum zero and not more than two numbers equal. A188239

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318419

Triangle read by rows: T(n,k), where n, k >= 2, is the number of n-element unlabeled connected series-parallel posets with k ordinal terms that are either the singleton or disconnected posets. A356558

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318423

Continued fraction for sqrt(811). A40782