728688588 has 12 divisors (see below), whose sum is σ = 1700273400. Its totient is φ = 242896192.

The previous prime is 728688581. The next prime is 728688593. The reversal of 728688588 is 885886827.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (728688581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30362013 + ... + 30362036.

It is an arithmetic number, because the mean of its divisors is an integer number (141689450).

Almost surely, 2^728688588 is an apocalyptic number.

It is an amenable number.

728688588 is an abundant number, since it is smaller than the sum of its proper divisors (971584812).

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

728688588 is a wasteful number, since it uses less digits than its factorization.

728688588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60724056 (or 60724054 counting only the distinct ones).

The product of its digits is 13762560, while the sum is 60.

The square root of 728688588 is about 26994.2324951090. The cubic root of 728688588 is about 899.8718286612.

The spelling of 728688588 in words is "seven hundred twenty-eight million, six hundred eighty-eight thousand, five hundred eighty-eight".