165128928 has 48 divisors (see below), whose sum is σ = 445188240. Its totient is φ = 53554176.

The previous prime is 165128917. The next prime is 165129011. The reversal of 165128928 is 829821561.

It is a happy number.

165128928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 165128928.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19693 + ... + 26796.

It is an arithmetic number, because the mean of its divisors is an integer number (9274755).

Almost surely, 2^165128928 is an apocalyptic number.

It is an amenable number.

165128928 is an abundant number, since it is smaller than the sum of its proper divisors (280059312).

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

165128928 is a wasteful number, since it uses less digits than its factorization.

165128928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46539 (or 46531 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 165128928 is about 12850.2501142974. The cubic root of 165128928 is about 548.6234756545.

The spelling of 165128928 in words is "one hundred sixty-five million, one hundred twenty-eight thousand, nine hundred twenty-eight".