30028028 has 12 divisors (see below), whose sum is σ = 52636752. Its totient is φ = 14988960.

The previous prime is 30028027. The next prime is 30028091. The reversal of 30028028 is 82082003.

It is a junction number, because it is equal to n+sod(n) for n = 30027994 and 30028012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30028027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3425 + ... + 8472.

It is an arithmetic number, because the mean of its divisors is an integer number (4386396).

Almost surely, 2^30028028 is an apocalyptic number.

It is an amenable number.

30028028 is a deficient number, since it is larger than the sum of its proper divisors (22608724).

30028028 is a wasteful number, since it uses less digits than its factorization.

30028028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12532 (or 12530 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 30028028 is about 5479.7835723685. The cubic root of 30028028 is about 310.8199866011.

The spelling of 30028028 in words is "thirty million, twenty-eight thousand, twenty-eight".