30805028 has 12 divisors (see below), whose sum is σ = 55162800. Its totient is φ = 15044232.

The previous prime is 30805009. The next prime is 30805079. The reversal of 30805028 is 82050803.

It is a junction number, because it is equal to n+sod(n) for n = 30804988 and 30805006.

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, 89378 + ... + 89721.

It is an arithmetic number, because the mean of its divisors is an integer number (4596900).

Almost surely, 2^30805028 is an apocalyptic number.

It is an amenable number.

30805028 is a deficient number, since it is larger than the sum of its proper divisors (24357772).

30805028 is a wasteful number, since it uses less digits than its factorization.

30805028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179146 (or 179144 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 30805028 is about 5550.2277430751. The cubic root of 30805028 is about 313.4780976858.

The spelling of 30805028 in words is "thirty million, eight hundred five thousand, twenty-eight".