Properties of the Number -3890

Eight Hundred Ninety

Basics

Value: -3891 → -3890 → -3889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 389

Divisors: 1, 2, 5, 10, 389, 778, 1945, 3890

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -111100110010

Octal: -7462

Duodecimal: -2302

Hexadecimal: -f32

Square: 15132100

Square Root: 62.369864518050704

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

Triangle read by rows giving the coefficients of general sum formulas of n-th Fibonacci numbers (A000045). The k-th row (k>=1) contains T(i,k) for i=1 to 2·k-1, where T(i,k) satisfies F(n) = ∑_k=1..n ∑_i=1..2·k-1 T(i,k) * C(n-k,i-1) * n^n-k / (n-1)!. A100492

Expansion of ∑_k>=0 k² * x^k/(1 + k·x). A349853

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 3.3.4.3.4 2D tiling (cf. A219529). A299255

Number of points on surface of square pyramid: 3·n² + 2 (n>0). A5918

Sum of three consecutive squares: a(n) = n² + (n + 1)² + (n + 2)². A120328

Number of ordered partitions of [n] such that at least two adjacent parts have the same size. A262046

Number of points on surface of hexagonal prism: 12·n² + 2 for n > 0 (coordination sequence for W(2)). A5914

Positive integers n such that n¹⁴ + 1 is semiprime (A001358). A104335

a(n) = ∑_k=1..n φ(k)². A57434

Sum of smallest parts of all partitions of n into odd parts. A92314