173405728 has 24 divisors (see below), whose sum is σ = 349721820. Its totient is φ = 84587520.

The previous prime is 173405699. The next prime is 173405747. The reversal of 173405728 is 827504371.

173405728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 172869904 + 535824 = 13148^2 + 732^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64773 + ... + 67396.

Almost surely, 2^173405728 is an apocalyptic number.

It is an amenable number.

173405728 is an abundant number, since it is smaller than the sum of its proper divisors (176316092).

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

173405728 is a wasteful number, since it uses less digits than its factorization.

173405728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132220 (or 132212 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 173405728 is about 13168.3608699033. The cubic root of 173405728 is about 557.6407205753.

The spelling of 173405728 in words is "one hundred seventy-three million, four hundred five thousand, seven hundred twenty-eight".