30728652 has 12 divisors (see below), whose sum is σ = 71700216. Its totient is φ = 10242880.

The previous prime is 30728641. The next prime is 30728669. The reversal of 30728652 is 25682703.

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

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, 1280349 + ... + 1280372.

It is an arithmetic number, because the mean of its divisors is an integer number (5975018).

Almost surely, 2^30728652 is an apocalyptic number.

It is an amenable number.

30728652 is an abundant number, since it is smaller than the sum of its proper divisors (40971564).

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

30728652 is a wasteful number, since it uses less digits than its factorization.

30728652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560728 (or 2560726 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 30728652 is about 5543.3430346678. The cubic root of 30728652 is about 313.2188108208.

The spelling of 30728652 in words is "thirty million, seven hundred twenty-eight thousand, six hundred fifty-two".