172869928 has 64 divisors (see below), whose sum is σ = 418089600. Its totient is φ = 65022720.

The previous prime is 172869887. The next prime is 172869937. The reversal of 172869928 is 829968271.

172869928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13026 + ... + 22702.

It is an arithmetic number, because the mean of its divisors is an integer number (6532650).

Almost surely, 2^172869928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172869928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209044800).

172869928 is an abundant number, since it is smaller than the sum of its proper divisors (245219672).

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

172869928 is a wasteful number, since it uses less digits than its factorization.

172869928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730 (or 9726 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 172869928 is about 13148.0009126863. Note that the first 3 decimals coincide. The cubic root of 172869928 is about 557.0657834713.

The spelling of 172869928 in words is "one hundred seventy-two million, eight hundred sixty-nine thousand, nine hundred twenty-eight".