Properties of the Number 18428

Eighteen Thousand Four Hundred Twenty-Eight

Basics

Value: 18427 → 18428 → 18429

Parity: even

Prime: No

Previous Prime: 18427

Next Prime: 18433

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 17 × 271

Divisors: 1, 2, 4, 17, 34, 68, 271, 542, 1084, 4607

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011111111100

Octal: 43774

Duodecimal: A7B8

Hexadecimal: 47fc

Square: 339591184

Square Root: 135.74976979722655

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 unlabeled distributive lattices on n nodes. A6982

Row sums of A051598. A53209

Numbers n such that n² is a sum of 2 and also of 4 consecutive primes. A252066

Expansion of ∏_k>=1 (1 - x^k)^k*(k+1/2). A292386

n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime. A116011

a(n) = 16·n² - 2·n. A158058

Lychrel numbers k that set a new record for the number of 'Reverse and Add' steps in base 2 needed to reach a Lychrel number m < k (i.e., its seed). A306481

Expansion of (1+5·x+7·x²-x³)/((1-2·x²)*(1-x)*(1+x)). A224692

Sum of lengths of SB (shortest border) factorizations over all binary strings of length n. A330886

Divisors of 388. A18428