Properties of the Number -18890

Eighteen Thousand Eight Hundred Ninety

Basics

Value: -18891 → -18890 → -18889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 1889

Divisors: 1, 2, 5, 10, 1889, 3778, 9445, 18890

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4938 Try Today's Challenge

Representations

Binary: -100100111001010

Octal: -44712

Duodecimal: -AB22

Hexadecimal: -49ca

Square: 356832100

Square Root: 137.44089638822936

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

Sum of the squarefree parts of the partitions of n into 4 parts. A309479

Number of ways to place 4n nonattacking kings on an 8 X 2n cylindrical chessboard. A194646

Triangle read by rows: T(n,k) is number of paths from (0,0) to (3n,0) that stay in the first quadrant (but may touch the horizontal axis), consisting of steps u=(2,1), U=(1,2), or d=(1,-1) and having k U=(1,2) steps among the steps leading to the first d step. A108441

Records in A353717. A353722

Number of ways to place 5n nonattacking kings on a vertical cylinder 10 X 2n. A195593

Index of prime(n) in A353709, or -1 if prime(n) does not appear in A353709. A353719

a(n) = sigma₃(n) - sigma₂(n) - sigma₁(n). A92350

Number of length-n binary words whose longest repeated suffix equals the longest repeated prefix. A327544

Numbers that cannot be expressed as the sum of one or more numbers without any repeated digits. A342080