Properties of the Number 28989

Twenty-Eight Thousand Nine Hundred Eighty-Nine

Basics

Value: 28988 → 28989 → 28990

Parity: odd

Prime: No

Previous Prime: 28979

Next Prime: 29009

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 3221

Divisors: 1, 3, 9, 3221, 9663, 28989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000100111101

Octal: 70475

Duodecimal: 14939

Hexadecimal: 713d

Square: 840362121

Square Root: 170.26156348395253

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

Odd composites k such that σ(k) has the same powerful part as k, where σ is the sum of divisors function. A386425

Terms k of A228058 such that gcd(k - A048250(k), A162296(k) - k) = A162296(k) - k. A325376

Number of partitions of n that do not contain 8 as a part. A27342

Numbers k in A228058 such that also A001065(k) is in A228058. A325380

Numbers k such that 10⁹⁹⁹ + k is a (titanic) prime. A74282

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 974", based on the 5-celled von Neumann neighborhood. A273852

Smallest palindromic prime with 2n-1 digits. A28989