728055172 has 12 divisors (see below), whose sum is σ = 1372104076. Its totient is φ = 336025440.

The previous prime is 728055169. The next prime is 728055187. The reversal of 728055172 is 271550827.

728055172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 160376896 + 567678276 = 12664^2 + 23826^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7000479 + ... + 7000582.

Almost surely, 2^728055172 is an apocalyptic number.

It is an amenable number.

728055172 is a deficient number, since it is larger than the sum of its proper divisors (644048904).

728055172 is a wasteful number, since it uses less digits than its factorization.

728055172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14001078 (or 14001076 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 728055172 is about 26982.4975122764. The cubic root of 728055172 is about 899.6110137947.

It can be divided in two parts, 72805 and 5172, that added together give a palindrome (77977).

The spelling of 728055172 in words is "seven hundred twenty-eight million, fifty-five thousand, one hundred seventy-two".