172064228 has 48 divisors (see below), whose sum is σ = 363525120. Its totient is φ = 69613344.

The previous prime is 172064203. The next prime is 172064261. The reversal of 172064228 is 822460271.

172064228 is digitally balanced in base 2, 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 = 172064194 and 172064203.

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, 267275 + ... + 267917.

It is an arithmetic number, because the mean of its divisors is an integer number (7573440).

Almost surely, 2^172064228 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 172064228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181762560).

172064228 is an abundant number, since it is smaller than the sum of its proper divisors (191460892).

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

172064228 is a wasteful number, since it uses less digits than its factorization.

172064228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 172064228 is about 13117.3254895958. The cubic root of 172064228 is about 556.1989911059.

The spelling of 172064228 in words is "one hundred seventy-two million, sixty-four thousand, two hundred twenty-eight".