30339728 has 20 divisors (see below), whose sum is σ = 58948608. Its totient is φ = 15127200.

The previous prime is 30339721. The next prime is 30339733. The reversal of 30339728 is 82793303.

It is a super-2 number, since 2×30339728² = 1840998190227968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30339721) 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 3 ways as a sum of consecutive naturals, for example, 3653 + ... + 8603.

Almost surely, 2^30339728 is an apocalyptic number.

It is an amenable number.

30339728 is a deficient number, since it is larger than the sum of its proper divisors (28608880).

30339728 is a wasteful number, since it uses less digits than its factorization.

30339728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5342 (or 5336 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 30339728 is about 5508.1510509426. The cubic root of 30339728 is about 311.8917551303.

The spelling of 30339728 in words is "thirty million, three hundred thirty-nine thousand, seven hundred twenty-eight".