30684028 has 12 divisors (see below), whose sum is σ = 53765712. Its totient is φ = 15322400.

The previous prime is 30684011. The next prime is 30684053. The reversal of 30684028 is 82048603.

It is a happy number.

It is a congruent number.

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, 1048 + ... + 7903.

It is an arithmetic number, because the mean of its divisors is an integer number (4480476).

Almost surely, 2^30684028 is an apocalyptic number.

It is an amenable number.

30684028 is a deficient number, since it is larger than the sum of its proper divisors (23081684).

30684028 is a wasteful number, since it uses less digits than its factorization.

30684028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9812 (or 9810 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 30684028 is about 5539.3165643426. The cubic root of 30684028 is about 313.0671190871.

The spelling of 30684028 in words is "thirty million, six hundred eighty-four thousand, twenty-eight".