Properties of the Number -19782

Nineteen Thousand Seven Hundred Eighty-Two

Basics

Value: -19783 → -19782 → -19781

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 × 157

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110101000110

Octal: -46506

Duodecimal: -B546

Hexadecimal: -4d46

Square: 391327524

Square Root: 140.6484980367725

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) = ∑_{d divides n} (-1)^{d + n/d} * d³. A321559

sigma₃(n): sum of cubes of divisors of n. A1158

a(n) = n³*∏_{distinct primes p dividing n} (1+1/p³). A65959

Sum of the cubes of the squarefree divisors of n. A351266

Numbers k such that k and 4·k are anagrams. A23088

Dirichlet inverse of sigma₃ function (A001158). A53825

Number of binary sequences of length n containing exactly one subsequence 010. A118430

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of the two medians of the central row and column minus the sum of the minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically. A254743

The sum of unitary divisors of the smallest cubefull number that is a multiple of n. A369721

a(0)=1, a(n) = sigma₃(2n). A91986