Properties of the Number 28189

Twenty-Eight Thousand One Hundred Eighty-Nine

Basics

Value: 28188 → 28189 → 28190

Parity: odd

Prime: No

Previous Prime: 28183

Next Prime: 28201

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 7 × 4027

Divisors: 1, 7, 4027, 28189

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111000011101

Octal: 67035

Duodecimal: 14391

Hexadecimal: 6e1d

Square: 794619721

Square Root: 167.89580101956093

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

Number of unrooted binary leaf-multi-labeled trees with n leaves on the label set [2], with each label used at least once. A220829

"Self-Fibonacci"; a(n) is the sum of the last nine terms. Sequence starts with 6,9,2,15,14,1,3,3,9 which are f,i,b,o,n,a,c,c,i if you consider a=1, b=2, c=3, ..., z=26. A129938

G.f. satisfies A(x) = 1 + x⁴*A(x)³ / (1 - x·A(x)). A365697

Integer part of ∑_i=1..n binomial(n,i) * (n/i)ⁱ. A7806

Floor (e^{n / log(n})). A96181

Expansion of 1/((1-5x)(1-7x)(1-11x)(1-12x)). A28189