Properties of the Number -5780

Seven Hundred Eighty

Basics

Value: -5781 → -5780 → -5779

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 17 ²

Divisors: 1, 2, 4, 5, 10, 17, 20, 34, 68, 85

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1011010010100

Octal: -13224

Duodecimal: -3418

Hexadecimal: -1694

Square: 33408400

Square Root: 76.02631123499285

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

Expansion of 1/sqrt(1 - 4·x*(1-x)³). A361816

Expansion of (∏_k>0 (1 - x^k) / (1 - x^5·k))⁵ in powers of x. A285932

a(n) = 5·n². A33429

Numbers whose unsorted prime signature is not unimodal. A332282

a(n) = a(n-1) + a(n-2) - 2, a(0) = 4, a(1) = 3. A211

Numbers n such that Bernoulli number B_n has denominator 330. A272183

a(n) = Fibonacci(2·n+1) + Fibonacci(2·n-1) + 2. A92387

Number T(n,k) of entries in the k-th cycles of all permutations of {1,2,..,n}; each cycle is written with the smallest element first and cycles are arranged in increasing order of their first elements. A185105

T(n,k)=Number of length n 1..(k+1) arrays with every leading partial sum divisible by 2, 3 or 5. A254827

Concentric 20-gonal numbers. A195148