165838 has 8 divisors (see below), whose sum is σ = 250488. Its totient is φ = 82344.

The previous prime is 165833. The next prime is 165857. The reversal of 165838 is 838561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (31311).

2¹⁶⁵⁸³⁸ is an apocalyptic number.

165838 is a deficient number, since it is larger than the sum of its proper divisors (84650).

165838 is a wasteful number, since it uses less digits than its factorization.

165838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578.

The product of its digits is 5760, while the sum is 31.

The square root of 165838 is about 407.2321205406. The cubic root of 165838 is about 54.9407626681.

The spelling of 165838 in words is "one hundred sixty-five thousand, eight hundred thirty-eight".