Properties of the Number 26690

Twenty-Six Thousand Six Hundred Ninety

Basics

Value: 26689 → 26690 → 26691

Parity: even

Prime: No

Previous Prime: 26687

Next Prime: 26693

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 5 × 17 × 157

Divisors: 1, 2, 5, 10, 17, 34, 85, 157, 170, 314

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 110100001000010

Octal: 64102

Duodecimal: 13542

Hexadecimal: 6842

Square: 712356100

Square Root: 163.37074401495514

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

Triangle of (Gaussian) q-binomial coefficients for q = -13. A15129

Gaussian binomial coefficient [ n,2 ] for q = -13. A15265

Numbers k such that k and k+1 are the product of exactly four distinct primes. A318896

Numbers k such that there are exactly 9 numbers j for which binomial(k, floor(k/2)) / binomial(k,j) is an integer, i.e., A080383(k) = 9. A327431

Numbers which are the sum of two squared primes in exactly three ways (ignoring order). A226562

Numbers that can be represented as a sum of two distinct nontrivial prime powers in three or more ways. A225104

a(n) = sigma₂(n)*sigma₃(n)/σ(n). A320917

Numbers n such that n+(n+1), n²+(n+1)², n+(n+1)², n²+(n+1) are all prime. A216270

Solutions to A096509[x]=6; number of prime-powers [including primes] in the neighborhood of·with Ceiling[Log[x]] radius equals 6. A96517

a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026681. A26690