Properties of the Number -1682

Six Hundred Eighty-Two

Basics

Value: -1683 → -1682 → -1681

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 29 ²

Divisors: 1, 2, 29, 58, 841, 1682

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -11010010010

Octal: -3222

Duodecimal: -B82

Hexadecimal: -692

Square: 2829124

Square Root: 41.012193308819754

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

Dirichlet inverse of sigma₂ function (A001157). A53822

Dirichlet g.f.: ζ(2·s) / (ζ(s) * ζ(s-2)). A328639

Expansion of ∏_k>=1 (1 - x^k)^k/(1 - x^5·k)^5·k. A285285

Triangle read by rows: real part of Lerch φ expansion of p(x,n) = 2ⁿ*(1 - i·x)ⁿ⁺¹ * LerchPhi(i·x, -n, 1/2). A143196

Triangle read by rows: T(n, k) = (-1)^n+k * A060187(n+1, k+1). A138076

a(n) = n² + 1. A2522

a(n) = sigma₂(n): sum of squares of divisors of n. A1157

a(n) = 2·n². A1105

Triangle read by rows: Eulerian numbers of type B, T(n,k) (1 <= k <= n) given by T(n, 1) = T(n,n) = 1, otherwise T(n, k) = (2·n - 2·k + 1)*T(n-1, k-1) + (2·k - 1)*T(n-1, k). A60187

a(n) = ∑_d∣n (-1)^d-1*d². A321543