Properties of the Number 28839

Twenty-Eight Thousand Eight Hundred Thirty-Nine

Basics

Value: 28838 → 28839 → 28840

Parity: odd

Prime: No

Previous Prime: 28837

Next Prime: 28843

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 9613

Divisors: 1, 3, 9613, 28839

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000010100111

Octal: 70247

Duodecimal: 14833

Hexadecimal: 70a7

Square: 831687921

Square Root: 169.82049346295045

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

E.g.f.: 1 - (1-x)*(tan(x) + sec(x)). A34428

Triangle read by rows: T(n,k) is the number of permutations p of [n] in which exactly the first k terms satisfy the up-down property, i.e., p(1)<p(2), p(2)>p(3), p(3)<p(4), ... A92580

β polynomials (coefficients in descending order, triangle read by rows). A177762

Expansion of ∏_k>=0 (1 + x^{3^k} + x^{2·3^k} + x^{3^(k+1}))^{3^k}. A309046

Number of compositions (ordered partitions) of n whereby at most 1 increase is allowed and this increase must be by 1. A90752

Sum of digits of n is a square. A28839