728165888 has 20 divisors (see below), whose sum is σ = 1454910600. Its totient is φ = 364082688.

The previous prime is 728165881. The next prime is 728165927. The reversal of 728165888 is 888561827.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728165881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710588 + ... + 711611.

It is an arithmetic number, because the mean of its divisors is an integer number (72745530).

Almost surely, 2^728165888 is an apocalyptic number.

It is an amenable number.

728165888 is a deficient number, since it is larger than the sum of its proper divisors (726744712).

728165888 is an equidigital number, since it uses as much as digits as its factorization.

728165888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422217 (or 1422201 counting only the distinct ones).

The product of its digits is 1720320, while the sum is 53.

The square root of 728165888 is about 26984.5490605272. The cubic root of 728165888 is about 899.6566130334.

The spelling of 728165888 in words is "seven hundred twenty-eight million, one hundred sixty-five thousand, eight hundred eighty-eight".