Properties of the Number 11890

Eleven Thousand Eight Hundred Ninety

Basics

Value: 11889 → 11890 → 11891

Parity: even

Prime: No

Previous Prime: 11887

Next Prime: 11897

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 29 × 41

Divisors: 1, 2, 5, 10, 29, 41, 58, 82, 145, 205

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10111001110010

Octal: 27162

Duodecimal: 6A6A

Hexadecimal: 2e72

Square: 141372100

Square Root: 109.04127658827184

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

Numbers k such that 6·k+1, 6·k+7, 6·k+13, 6·k+19 are consecutive primes. A90839

Numbers n such that 6n+5, 6n+11, 6n+17, 6n+23 are consecutive primes or 6n+1, 6n+7, 6n+13, 6n+19 are consecutive primes. A90833

Distinct values of A378664(k) in the order of appearance, when k ranges over those primitively abundant numbers k for which A378664(k) is less than the largest proper divisor of k. A378740

G.f.: A(x) = (1 + 21·x + 3·x² - x³)/(1-x)⁵. A183066

Total sum T(n,k) of number of λ-parking functions of partitions λ of n into distinct parts with largest part k; triangle T(n,k), k>=0, k<=n<=k*(k+1)/2, read by columns. A265019

a(n) = 9 + floor((3 + ∑_j=1..n-1 a(j))/4). A120167

a(n) = Pell(n)*A109064(n) for n >= 1 with a(0)=1. A205884

Numbers k that are the product of four distinct primes such that x²+y² = k has integer solutions. A248712

Numbers k such that 19·2^k+1 is prime. A32359

Numbers k such that 1000k+1, 1000k+3, 1000k+7, 1000k+9 are all primes. A64962