172928228 has 24 divisors (see below), whose sum is σ = 337163904. Its totient is φ = 76930400.

The previous prime is 172928227. The next prime is 172928263. The reversal of 172928228 is 822829271.

172928228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (172928221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39743 + ... + 43878.

It is an arithmetic number, because the mean of its divisors is an integer number (14048496).

Almost surely, 2^172928228 is an apocalyptic number.

It is an amenable number.

172928228 is a deficient number, since it is larger than the sum of its proper divisors (164235676).

172928228 is a wasteful number, since it uses less digits than its factorization.

172928228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83683 (or 83681 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 172928228 is about 13150.2177928732. The cubic root of 172928228 is about 557.1283994996.

The spelling of 172928228 in words is "one hundred seventy-two million, nine hundred twenty-eight thousand, two hundred twenty-eight".