Properties of the Number 27690

Twenty-Seven Thousand Six Hundred Ninety

Basics

Value: 27689 → 27690 → 27691

Parity: even

Prime: No

Previous Prime: 27689

Next Prime: 27691

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 13 × 71

Divisors: 1, 2, 3, 5, 6, 10, 13, 15, 26, 30

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110110000101010

Octal: 66052

Duodecimal: 14036

Hexadecimal: 6c2a

Square: 766736100

Square Root: 166.40312497065673

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) is the largest integer k such that there is an integer m with exactly n nonunitary prime factors and m + A005117(i) is squarefree for 1 <= i <= k. A390138

Numbers k such that k and 5·k, taken together, are pandigital. A115925

Consecutive states of the linear congruential pseudo-random number generator (419·s + 6173) mod 29282 when started at s=1. A385036

G.f.: ∑_n>=0 xⁿ / (1-4·x)^2·n+1 * [∑_k=0..n C(n,k)² * 3^k * x^k] * [∑_k=0..n C(n,k)² * 4^k * x^k]. A246510

Products of 5 distinct primes that are sandwiched between twin prime numbers. A376380

Triangle read by rows: T(n,k) is the number of Motzkin paths of length n with k valleys (n>=0, 0<=k<=floor(n/2)-1; a valley is a downstep followed by an upstep). A97885

Averages of twin prime pairs of the form : sum of two or more consecutive squares. A174716

Numbers n = p·q, where n, p, and q together contain all 10 digits at least once. A253172

Number of 2-colorings of length n without an arithmetic progression of length 5. A378197

a(n) = binomial(2·n,n) + ∑_k=1..n binomial(2·n-k,n-k)*Fibonacci(k). A277287