Properties of the Number 8990

Eight Thousand Nine Hundred Ninety

Basics

Value: 8989 → 8990 → 8991

Parity: even

Prime: No

Previous Prime: 8971

Next Prime: 8999

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 × 5 × 29 × 31

Divisors: 1, 2, 5, 10, 29, 31, 58, 62, 145, 155

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001100011110

Octal: 21436

Duodecimal: 5252

Hexadecimal: 231e

Square: 80820100

Square Root: 94.81561052906846

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) = 2·binomial(n,3). A7290

Number of refinement-ordered pairs of strict integer partitions of n. A317142

Number of integer partitions of n whose parts have choosable sets of strict integer partitions. A387178

Number of digraphs on n unlabeled nodes with a sink (or, with a source). A51421

Partition the concatenation 1234567...of natural numbers into successive strings which are even, all different and > 2. (0 never taken as the most significant digit.) A77295

Digitally balanced numbers in base 6: equal numbers of 0's, 1's, ..., 5's. A49357

Number of partitions of n such that the least part occurs exactly three times. A97091

n times n+2 gives the concatenation of two numbers m and m-3. A116266

Denominator of b(n)-b(n+1), where b(n) = n/((n+1)(n+2)) = A026741/A045896. A51713

a(n) = 8·binomial(6·n+8,n)/(6·n+8). A233827