201838 has 16 divisors (see below), whose sum is σ = 372960. Its totient is φ = 79776.

The previous prime is 201833. The next prime is 201847. The reversal of 201838 is 838102.

201838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201833) by changing a digit.

201838 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (23310).

2²⁰¹⁸³⁸ is an apocalyptic number.

201838 is a deficient number, since it is larger than the sum of its proper divisors (171122).

201838 is a wasteful number, since it uses less digits than its factorization.

201838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 201838 is about 449.2638423020. The cubic root of 201838 is about 58.6589535888.

The spelling of 201838 in words is "two hundred one thousand, eight hundred thirty-eight".