Properties of the Number -17890

Seventeen Thousand Eight Hundred Ninety

Basics

Value: -17891 → -17890 → -17889

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 5 × 1789

Divisors: 1, 2, 5, 10, 1789, 3578, 8945, 17890

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100010111100010

Octal: -42742

Duodecimal: -A42A

Hexadecimal: -45e2

Square: 320052100

Square Root: 133.75350462698165

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

Numbers k such that numerator(Bernoulli(2·k)/(2·k)) is different from numerator(Bernoulli(2·k)/(2·k*(2·k-1))). A90495

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4. A197889

Numbers k such that prime(k+3)-(k+3)*τ(k+3) = prime(k-3)-(k-3)*τ(k-3) where τ(k) = A000005(k) is the number of divisors of k. A67355

Numbers in ascending order formed by using all the digits of the next n numbers. A81991

Number of embeddings on the sphere of planar graphs with n edges having connectivity exactly 2 and minimum vertex degree at least 3. A187928

Number of partitions of n such that (greatest part) is not = (multiplicity of greatest part). A240057

a(n) = (6·n⁴ + 30·n³ - 20·n² + 14)*n/30 + (n mod 2). A64837

Triangle read by rows. Inverse of the convolution triangle of A108524, the number of ordered rooted trees with n generators. A357585

Number of nX5 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4. A197886

Number of nX6 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 0,2,1,1,1 for x=0,1,2,3,4. A197887