Properties of the Number 28338

Twenty-Eight Thousand Three Hundred Thirty-Eight

Basics

Value: 28337 → 28338 → 28339

Parity: even

Prime: No

Previous Prime: 28319

Next Prime: 28349

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 4723

Divisors: 1, 2, 3, 6, 4723, 9446, 14169, 28338

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111010110010

Octal: 67262

Duodecimal: 14496

Hexadecimal: 6eb2

Square: 803042244

Square Root: 168.33894380089237

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

Maximal value of ∑_i=1..n (p(i) - p(i+1))², where p(n+1) = p(1), as p ranges over all permutations of {1, 2, ..., n}. A64842

Number of regions in a graph of n adjacent rectangles in a row with all possible diagonals drawn, as in A306302, but without the rectangles' edges which are perpendicular to the row. A369175

a(n) = ∑_j=1..n prime(j)*2^j-2. A135483

G.f.: A(x) = 1 + x·G(x)/F(x) where F(x) = A(x/F(x)) and G(x) = A(x·G(x)). A184506

a(n) = ∑_k=1..n floor(n/(2·k-1))³. A350144

G.f. satisfies A(x) = 1/(1-x) + x⁴*A(x)⁴. A364591

Numbers n such that 7·10ⁿ + 3 is prime. A97970

a(n) = 27·n²/2 + 45·n/2 - 12 (n>=1). A304375

Numbers k such that k and k² use only the digits 0, 2, 3, 4 and 8. A136885

Numbers k such that the five numbers k²+1, (k+1)²+1, ..., (k+4)²+1 are all semiprime. A261546