Properties of the Number -209628

Two Hundred Nine Thousand Six Hundred Twenty-Eight

Basics

Value: -209629 → -209628 → -209627

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ⁴ × 647

Divisors: 1, 2, 3, 4, 6, 9, 12, 18, 27, 36

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -110011001011011100

Octal: -631334

Duodecimal: -A1390

Hexadecimal: -332dc

Square: 43943898384

Square Root: 457.8515043111686

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) = n²*(2·n² - 1); also ∑_k=0..n-1 (2k+1)³. A2593

Transform of n³ by the Riordan array (1/(1-x²), x). A105636

Smallest triangular number with exactly n divisors, or 0 if no such number exists. A81978

Triangular numbers that are the product of a square number and a prime number. A253653

Triangular arithmetic on half-squares: b(n)*(b(n) - 1)/2 where b(n) = floor(n²/2). A227970

Smallest positive integer b such that b^2ⁿ+1 is divisible by the square of A035089(n+1). A261117

Numbers k such that σ(φ(σ(k))) = σ(k). A66471

Triangular numbers k such that ψ(k) is a square, where ψ(k) is the Dedekind ψ function (A001615). A292064