Properties of the Number 26443

Twenty-Six Thousand Four Hundred Forty-Three

Basics

Value: 26442 → 26443 → 26444

Parity: odd

Prime: No

Previous Prime: 26437

Next Prime: 26449

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 31 × 853

Divisors: 1, 31, 853, 26443

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110011101001011

Octal: 63513

Duodecimal: 13377

Hexadecimal: 674b

Square: 699232249

Square Root: 162.61303760769

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) = ∑_k=0..n-1 Bell(k), where the Bell numbers Bell(k) are given in A000110. A5001

a(n) = A273059(4n). A275916

Number of 6 X 6 X 6 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n. A166214

Numerator of ∑_i=0..n-1 B(i)/B(n), where B(i) = A000110(i) are the Bell numbers. A192986

Coefficients in asymptotic expansion of sequence A293259. A293265

Triangle read by rows: T(n,0)=B(n) (the Bell numbers, A000110(n)), T(n,k)=0 for k < 0 or k > n, T(n,k) = T(n-1,k) + T(n-1,k-1) for n >= 1, 0 <= k <= n. A125178

Numbers k such that k and k² use only the digits 2, 3, 4, 6 and 9. A137073

Number of n X n X n triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= 11. A166206

Number of length n+2 0..9 arrays with no three elements in a row with pattern aba or abb (with a≠b) and new values 0..9 introduced in 0..9 order. A243518

a(n) = (1/3)*n³ - n² - (1/3)*n - 1. A109620