Properties of the Number 11990

Eleven Thousand Nine Hundred Ninety

Basics

Value: 11989 → 11990 → 11991

Parity: even

Prime: No

Previous Prime: 11987

Next Prime: 12007

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 5 × 11 × 109

Divisors: 1, 2, 5, 10, 11, 22, 55, 109, 110, 218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111011010110

Octal: 27326

Duodecimal: 6B32

Hexadecimal: 2ed6

Square: 143760100

Square Root: 109.4988584415381

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) = n*(3·n² - 1)/2. A4188

Product of a prime and the following number. A36690

T(n,k) = number of n X k 0..2 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A224262

a(n) = (3·n+1)*(3·n+2). A1504

Number of doubletons in all partitions of n. By a doubleton in a partition we mean an occurrence of a part exactly twice (the partition [4,(3,3),2,2,2,(1,1)] has two doubletons, shown between parentheses). A116646

Numbers that are the sum of five third powers in exactly ten ways. A345188

Deficient oblong numbers. A77804

a(n) = (4·n+1)*(4·n+2) = (4·n+2)!/(4·n)!. A157870

Squarefree oblong numbers. A229882

Number of partitions of 7n into exactly 4 parts. A256329