30121828 has 12 divisors (see below), whose sum is σ = 57505392. Its totient is φ = 13691720.

The previous prime is 30121769. The next prime is 30121829. The reversal of 30121828 is 82812103.

It is not an unprimeable number, because it can be changed into a prime (30121829) 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, 342250 + ... + 342337.

It is an arithmetic number, because the mean of its divisors is an integer number (4792116).

Almost surely, 2^30121828 is an apocalyptic number.

It is an amenable number.

30121828 is a deficient number, since it is larger than the sum of its proper divisors (27383564).

30121828 is a wasteful number, since it uses less digits than its factorization.

30121828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684602 (or 684600 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 30121828 is about 5488.3356311363. The cubic root of 30121828 is about 311.1432913236.

The spelling of 30121828 in words is "thirty million, one hundred twenty-one thousand, eight hundred twenty-eight".