30168028 has 12 divisors (see below), whose sum is σ = 57593592. Its totient is φ = 13712720.

The previous prime is 30168011. The next prime is 30168037. The reversal of 30168028 is 82086103.

It is a junction number, because it is equal to n+sod(n) for n = 30167987 and 30168005.

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, 342775 + ... + 342862.

It is an arithmetic number, because the mean of its divisors is an integer number (4799466).

Almost surely, 2^30168028 is an apocalyptic number.

It is an amenable number.

30168028 is a deficient number, since it is larger than the sum of its proper divisors (27425564).

30168028 is a wasteful number, since it uses less digits than its factorization.

30168028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685652 (or 685650 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 30168028 is about 5492.5429447570. The cubic root of 30168028 is about 311.3022842980.

The spelling of 30168028 in words is "thirty million, one hundred sixty-eight thousand, twenty-eight".