172850728 has 16 divisors (see below), whose sum is σ = 326272500. Its totient is φ = 85844736.

The previous prime is 172850723. The next prime is 172850729. The reversal of 172850728 is 827058271.

172850728 is digitally balanced in base 2, 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 137780644 + 35070084 = 11738^2 + 5922^2 .

It is not an unprimeable number, because it can be changed into a prime (172850723) 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, 71313 + ... + 73696.

Almost surely, 2^172850728 is an apocalyptic number.

It is an amenable number.

172850728 is a deficient number, since it is larger than the sum of its proper divisors (153421772).

172850728 is a wasteful number, since it uses less digits than its factorization.

172850728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145164 (or 145160 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 172850728 is about 13147.2707433901. The cubic root of 172850728 is about 557.0451589875.

The spelling of 172850728 in words is "one hundred seventy-two million, eight hundred fifty thousand, seven hundred twenty-eight".