30028686 has 16 divisors (see below), whose sum is σ = 60234624. Its totient is φ = 9980024.

The previous prime is 30028679. The next prime is 30028711. The reversal of 30028686 is 68682003.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 5130 + ... + 9293.

It is an arithmetic number, because the mean of its divisors is an integer number (3764664).

Almost surely, 2^30028686 is an apocalyptic number.

30028686 is an abundant number, since it is smaller than the sum of its proper divisors (30205938).

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

30028686 is a wasteful number, since it uses less digits than its factorization.

30028686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 30028686 is about 5479.8436109072. The cubic root of 30028686 is about 310.8222569029.

The spelling of 30028686 in words is "thirty million, twenty-eight thousand, six hundred eighty-six".