Properties of the Number 39858

Thirty-Nine Thousand Eight Hundred Fifty-Eight

Basics

Value: 39857 → 39858 → 39859

Parity: even

Prime: No

Previous Prime: 39857

Next Prime: 39863

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 13 × 73

Divisors: 1, 2, 3, 6, 7, 13, 14, 21, 26, 39

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001101110110010

Octal: 115662

Duodecimal: 1B096

Hexadecimal: 9bb2

Square: 1588660164

Square Root: 199.64468437702016

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 ways to place 3 nonattacking kings on a 3 X n board. A172202

a(n) = floor((1 + 3ⁿ)/(1 + 3·n)). A191634

The Wiener index of the dendrimer D_n defined pictorially in Fig. 1 of the Heydari et al. reference. A227708

Sequence defined by a(1)=a(2)=1 and a(n) = gray(gray(a(n-1)) + gray(a(n-2))), with gray(m) = A003188(m). A265386

a(n) = ∑_k=0..(n-1)/2 (n+2-k)*binomial(n-1-k,k). A271785

a(n) = (A084218(n) - 1)/12. A373040

Base-9 palindromes that start with 6. A43033

Composite numbers k such that P(k, 7) == 7 (mod k), where P(k, 7) = A084768(k) is the k-th Legendre polynomial evaluated at 7. A330205

Triangle read by rows: T(n,k) is the number of planar tanglegrams of size n with irreducible component of size k. A371659

Number of partitions satisfying cn(0,5) = cn(1,5) + cn(4,5). A39858