172707728 has 20 divisors (see below), whose sum is σ = 338655408. Its totient is φ = 85312800.

The previous prime is 172707671. The next prime is 172707757. The reversal of 172707728 is 827707271.

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 3 ways as a sum of consecutive naturals, for example, 63698 + ... + 66353.

Almost surely, 2^172707728 is an apocalyptic number.

It is an amenable number.

172707728 is a deficient number, since it is larger than the sum of its proper divisors (165947680).

172707728 is a wasteful number, since it uses less digits than its factorization.

172707728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130142 (or 130136 counting only the distinct ones).

The product of its (nonzero) digits is 76832, while the sum is 41.

The square root of 172707728 is about 13141.8312270399. The cubic root of 172707728 is about 556.8915014826.

The spelling of 172707728 in words is "one hundred seventy-two million, seven hundred seven thousand, seven hundred twenty-eight".