Properties of the Number 9890

Nine Thousand Eight Hundred Ninety

Basics

Value: 9889 → 9890 → 9891

Parity: even

Prime: No

Previous Prime: 9887

Next Prime: 9901

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 23 × 43

Divisors: 1, 2, 5, 10, 23, 43, 46, 86, 115, 215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011010100010

Octal: 23242

Duodecimal: 5882

Hexadecimal: 26a2

Square: 97812100

Square Root: 99.44847912361456

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

a(n) = n*(n²+3·n-1)/3. A84990

Number of antichains of multisets with multiset-join a normal multiset of size n. A317073

Number of compositions of n with equal circular differences up to sign. A325558

a(n) = p(n)*p(n+2)-p(n+1), where p(n) is the n-th prime. A152530

Maximal value of ∑_i=1..n (p(i) - p(i+1))², where p(n+1) = p(1), as p ranges over all permutations of {1, 2, ..., n}. A64842

a(n+1) = a(n) + (if a(n) is odd then (next odd square) else (next even square)), a(0) = 1. A116955

G.f.: ∑_k>=1 x^k/(1+x^k) * ∏_k>=1 (1+x^k)/(1-x^k). A305101

Composite integers m such that A003500(m) == 4 (mod m). A335673

Number of non-stereoisomeric paraffins with n carbon atoms. A627

a(n) = (3·n - 1)*(4·n - 1). A33578