Properties of the Number 28899

Twenty-Eight Thousand Eight Hundred Ninety-Nine

Basics

Value: 28898 → 28899 → 28900

Parity: odd

Prime: No

Previous Prime: 28879

Next Prime: 28901

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 13 ² × 19

Divisors: 1, 3, 9, 13, 19, 39, 57, 117, 169, 171

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000011100011

Octal: 70343

Duodecimal: 14883

Hexadecimal: 70e3

Square: 835152201

Square Root: 169.99705879808627

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*(n+1)²/2. A6002

a(n) = (4·n+1)*(4·n+3). A1539

Number of ways to write n as an ordered sum of 9 nonzero triangular numbers. A340954

Expansion of η(q)² / (η(q²) * η(q⁴)⁶) in powers of q. A134414

a(n) = n*(2·n+1)². A84367

a(n) = 19·n². A244631

Expansion of φ(x) / f(-x)⁶ in powers of·where φ(), f() are Ramanujan θ functions. A134415

a(n) = n² * floor(n/2). A265645

Numbers n such that A083722(n) > 1 and A083722(n) occurs earlier in A083722. A293894

a(n) = ∑_k=1..n binomial(k, n mod k). A72951