30785028 has 24 divisors (see below), whose sum is σ = 76057632. Its totient is φ = 9657984.

The previous prime is 30784991. The next prime is 30785057. The reversal of 30785028 is 82058703.

It is a self number, because there is not a number n which added to its sum of digits gives 30785028.

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 7 ways as a sum of consecutive naturals, for example, 75250 + ... + 75657.

It is an arithmetic number, because the mean of its divisors is an integer number (3169068).

Almost surely, 2^30785028 is an apocalyptic number.

It is an amenable number.

30785028 is an abundant number, since it is smaller than the sum of its proper divisors (45272604).

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

30785028 is a wasteful number, since it uses less digits than its factorization.

30785028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150931 (or 150929 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 30785028 is about 5548.4257226713. The cubic root of 30785028 is about 313.4102416714.

The spelling of 30785028 in words is "thirty million, seven hundred eighty-five thousand, twenty-eight".