172028668 has 24 divisors (see below), whose sum is σ = 346257632. Its totient is φ = 73255104.

The previous prime is 172028653. The next prime is 172028677. The reversal of 172028668 is 866820271.

172028668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×172028668² = 59187725227708448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172028668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15171 + ... + 23962.

Almost surely, 2^172028668 is an apocalyptic number.

It is an amenable number.

172028668 is an abundant number, since it is smaller than the sum of its proper divisors (174228964).

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

172028668 is a wasteful number, since it uses less digits than its factorization.

172028668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39301 (or 39299 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 172028668 is about 13115.9699603194. The cubic root of 172028668 is about 556.1606724714.

The spelling of 172028668 in words is "one hundred seventy-two million, twenty-eight thousand, six hundred sixty-eight".