155838 has 16 divisors (see below), whose sum is σ = 328320. Its totient is φ = 49176.

The previous prime is 155833. The next prime is 155849. The reversal of 155838 is 838551.

It is a happy number.

155838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155833) by changing a digit.

155838 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, 570 + ... + 797.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

155838 is a Friedman number, since it can be written as 38*(8^(5-1)+5), using all its digits and the basic arithmetic operations.

2¹⁵⁵⁸³⁸ is an apocalyptic number.

155838 is an abundant number, since it is smaller than the sum of its proper divisors (172482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155838 is a wasteful number, since it uses less digits than its factorization.

155838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its digits is 4800, while the sum is 30.

The square root of 155838 is about 394.7632201713. The cubic root of 155838 is about 53.8134854693.

It can be divided in two parts, 1558 and 38, that added together give a triangular number (1596 = T₅₆).

The spelling of 155838 in words is "one hundred fifty-five thousand, eight hundred thirty-eight".