172728398 has 16 divisors (see below), whose sum is σ = 275644944. Its totient is φ = 80895360.

The previous prime is 172728371. The next prime is 172728403. The reversal of 172728398 is 893827271.

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, 4865 + ... + 19212.

It is an arithmetic number, because the mean of its divisors is an integer number (17227809).

Almost surely, 2^172728398 is an apocalyptic number.

172728398 is a deficient number, since it is larger than the sum of its proper divisors (102916546).

172728398 is a wasteful number, since it uses less digits than its factorization.

172728398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24307.

The product of its digits is 338688, while the sum is 47.

The square root of 172728398 is about 13142.6176235939. The cubic root of 172728398 is about 556.9137172191.

The spelling of 172728398 in words is "one hundred seventy-two million, seven hundred twenty-eight thousand, three hundred ninety-eight".