Properties of the Number 28609

Twenty-Eight Thousand Six Hundred Nine

Basics

Value: 28608 → 28609 → 28610

Parity: odd

Prime: No

Previous Prime: 28607

Next Prime: 28619

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 7 × 61 × 67

Divisors: 1, 7, 61, 67, 427, 469, 4087, 28609

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111111000001

Octal: 67701

Duodecimal: 14681

Hexadecimal: 6fc1

Square: 818474881

Square Root: 169.14195221765652

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) = 5ⁿ mod 2ⁿ. A29757

Numbers n with property that n² starts and ends with 81. A159775

Replacing each digit d in decimal expansion of n with d² yields a prime at each step when done recursively three times. A316604

Numbers that are the product of 3 prime factors whose concatenation is a palindrome. A46452

Number of 2Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 4 neighboring 1s. A297734

Expansion of (theta₃(z)*theta₃(11z) + theta₂(z)*theta₂(11z)). A28609

Decimal expansion of constant z = ∑_n>=1 {(5/2)ⁿ} * (2/5)ⁿ, where {x} is the fractional part of x. A264920