172150728 has 32 divisors (see below), whose sum is σ = 445219200. Its totient is φ = 55404608.

The previous prime is 172150673. The next prime is 172150733. The reversal of 172150728 is 827051271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122976 + ... + 124367.

It is an arithmetic number, because the mean of its divisors is an integer number (13913100).

Almost surely, 2^172150728 is an apocalyptic number.

It is an amenable number.

172150728 is an abundant number, since it is smaller than the sum of its proper divisors (273068472).

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

172150728 is a wasteful number, since it uses less digits than its factorization.

172150728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247381 (or 247377 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 172150728 is about 13120.6222413421. The cubic root of 172150728 is about 556.2921794721.

The spelling of 172150728 in words is "one hundred seventy-two million, one hundred fifty thousand, seven hundred twenty-eight".