30858028 has 12 divisors (see below), whose sum is σ = 54558952. Its totient is φ = 15269760.

The previous prime is 30858013. The next prime is 30858029. The reversal of 30858028 is 82085803.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 30857984 and 30858002.

It is not an unprimeable number, because it can be changed into a prime (30858029) 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, 39378 + ... + 40153.

Almost surely, 2^30858028 is an apocalyptic number.

It is an amenable number.

30858028 is a deficient number, since it is larger than the sum of its proper divisors (23700924).

30858028 is a wasteful number, since it uses less digits than its factorization.

30858028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79632 (or 79630 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 30858028 is about 5555.0002700270. Note that the first 3 decimals coincide. The cubic root of 30858028 is about 313.6577741979.

The spelling of 30858028 in words is "thirty million, eight hundred fifty-eight thousand, twenty-eight".