Properties of the Number 1836

One Thousand Eight Hundred Thirty-Six

Basics

Value: 1835 → 1836 → 1837

Parity: even

Prime: No

Previous Prime: 1831

Next Prime: 1847

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ³ × 17

Divisors: 1, 2, 3, 4, 6, 9, 12, 17, 18, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100101100

Octal: 3454

Duodecimal: 1090

Hexadecimal: 72c

Square: 3370896

Square Root: 42.8485705712571

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*σ(n). A64987

Skew Fibonacci-Pascal triangle read by rows. A37027

Convolved Fibonacci numbers. A1628

Multiples of 18 containing a 18 in their decimal representation. A121038

Number of unlabeled n-node simple graphs with at most one cycle in each connected component. A134964

12 times triangular numbers. A49598

Coordination sequence for (2,3,9) tiling of hyperbolic plane. A265059

Pairs (j, k) of numbers j<k such that φ(j) = φ(k), σ(j) = σ(k), d(j) = d(k). A134922

Indices n such that A019328(n) = φ(n,10) is prime, where φ is a cyclotomic polynomial. A138940

a(n) = n*(5·n+1)/2. A5475