30663928 has 16 divisors (see below), whose sum is σ = 58718880. Its totient is φ = 15005568.

The previous prime is 30663923. The next prime is 30663947. The reversal of 30663928 is 82936603.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30663923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40401 + ... + 41152.

It is an arithmetic number, because the mean of its divisors is an integer number (3669930).

Almost surely, 2^30663928 is an apocalyptic number.

It is an amenable number.

30663928 is a deficient number, since it is larger than the sum of its proper divisors (28054952).

30663928 is a wasteful number, since it uses less digits than its factorization.

30663928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81606 (or 81602 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 30663928 is about 5537.5019638823. The cubic root of 30663928 is about 312.9987444958.

The spelling of 30663928 in words is "thirty million, six hundred sixty-three thousand, nine hundred twenty-eight".