30528724 has 24 divisors (see below), whose sum is σ = 54643680. Its totient is φ = 14919456.

The previous prime is 30528721. The next prime is 30528733. The reversal of 30528724 is 42782503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30528721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 65139 + ... + 65605.

It is an arithmetic number, because the mean of its divisors is an integer number (2276820).

Almost surely, 2^30528724 is an apocalyptic number.

It is an amenable number.

30528724 is a deficient number, since it is larger than the sum of its proper divisors (24114956).

30528724 is a wasteful number, since it uses less digits than its factorization.

30528724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 30528724 is about 5525.2804453711. The cubic root of 30528724 is about 312.5380399560.

The spelling of 30528724 in words is "thirty million, five hundred twenty-eight thousand, seven hundred twenty-four".