Properties of the Number 1838

One Thousand Eight Hundred Thirty-Eight

Basics

Value: 1837 → 1838 → 1839

Parity: even

Prime: No

Previous Prime: 1831

Next Prime: 1847

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 919

Divisors: 1, 2, 919, 1838

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11100101110

Octal: 3456

Duodecimal: 1092

Hexadecimal: 72e

Square: 3378244

Square Root: 42.871902220452036

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

Number of unimodular 2 X 2 matrices having all terms in {0,1,...,n}. A210000

|First digit - second digit + third digit - fourth digit ...| = 12. A60980

Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 24. A51965

Number of fixed 2-dimensional triangular-celled animals with n cells (n-iamonds, polyiamonds) in the 2-dimensional hexagonal lattice. A1420

Expansion of ∑_k>=0 x^k²+k/((1-x)(1-x²)...(1-x^2k)). A122134

Numbers where 8 outnumbers any other digit. A292458

Number of distinct values taken by 6⁶^...⁶ (with n 6's and parentheses inserted in all possible ways). A145546

Expansion of ∏_k>=1 1/(1-x^3·k-2)^k. A262877

Triangle read by rows: T(m,n) = ∑_{-m<i<m, -n<j<n, gcd{i,j}=1} (m-|i|)*(n-|j|), m >= n >= 1. A332350

Semiprimes sandwiched between semiprimes. A86005