165387638 has 32 divisors (see below), whose sum is σ = 277572960. Its totient is φ = 73382400.

The previous prime is 165387637. The next prime is 165387643. The reversal of 165387638 is 836783561.

It is a happy number.

165387638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165387592 and 165387601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165387637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302081 + ... + 302627.

It is an arithmetic number, because the mean of its divisors is an integer number (8674155).

Almost surely, 2^165387638 is an apocalyptic number.

165387638 is a deficient number, since it is larger than the sum of its proper divisors (112185322).

165387638 is a wasteful number, since it uses less digits than its factorization.

165387638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992.

The product of its digits is 725760, while the sum is 47.

The square root of 165387638 is about 12860.3125156428. The cubic root of 165387638 is about 548.9098384014.

The spelling of 165387638 in words is "one hundred sixty-five million, three hundred eighty-seven thousand, six hundred thirty-eight".