Properties of the Number -1680345

Six Hundred Eighty Thousand Three Hundred Forty-Five

Basics

Value: -1680346 → -1680345 → -1680344

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁶ × 5 × 461

Divisors: 1, 3, 5, 9, 15, 27, 45, 81, 135, 243

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

9108 Try Today's Challenge

Representations

Binary: -110011010001111011001

Octal: -6321731

Duodecimal: -690509

Hexadecimal: -19a3d9

Square: 2823559319025

Square Root: 1296.2812194890428

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

Number of labeled trees with a forbidden limb of length 3. A52323

a(n) = ∑_d∣n d^d+n/d * binomial(d,n/d). A360759