Properties of the Number 28241

Twenty-Eight Thousand Two Hundred Forty-One

Basics

Value: 28240 → 28241 → 28242

Parity: odd

Prime: No

Previous Prime: 28229

Next Prime: 28277

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 31 × 911

Divisors: 1, 31, 911, 28241

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110111001010001

Octal: 67121

Duodecimal: 14415

Hexadecimal: 6e51

Square: 797554081

Square Root: 168.05058762170395

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

Partial sums of A299266. A299267

T(n,k)=Number of nXk 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4. A240460

Numbers k such that there are exactly four biquadratefree powerful numbers (A338325) between k² and (k+1)². A338391

Number of base 19 circular n-digit numbers with adjacent digits differing by 2 or less. A124947

Semiprimes formed by inserting a semiprime between the semiprime's ordered factors. A227942

a(n) = 2·n⁴ - floor(2^1/4*n)⁴. A257854

G.f.: A(x) = ∑_n>=0 xⁿ * (1 + (-1)ⁿ * sqrt(A(x)))ⁿ / (1 - (-1)ⁿ * x·sqrt(A(x)))ⁿ⁺¹. A325156

Number of 2 X n 0..3 arrays with no element equal to one plus the sum of elements to its left or three plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest, modulo 4. A240461

a(n) = abs(a(n-1) - a(n-2)) if a(n-1) and a(n-2) are both prime or both composite. a(n) = a(n-1) + a(n-2) otherwise, where a(1) = 1 and a(2) = 2 and n > 2. A341130

Weight distribution of (256,2²⁴⁰,6) Preparata code. A28241