30306928 has 20 divisors (see below), whose sum is σ = 59465440. Its totient is φ = 14961024.

The previous prime is 30306917. The next prime is 30306929. The reversal of 30306928 is 82960303.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30306928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30306929) 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, 10725 + ... + 13252.

It is an arithmetic number, because the mean of its divisors is an integer number (2973272).

Almost surely, 2^30306928 is an apocalyptic number.

It is an amenable number.

30306928 is a deficient number, since it is larger than the sum of its proper divisors (29158512).

30306928 is a wasteful number, since it uses less digits than its factorization.

30306928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24064 (or 24058 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30306928 is about 5505.1728401568. The cubic root of 30306928 is about 311.7793201702.

The spelling of 30306928 in words is "thirty million, three hundred six thousand, nine hundred twenty-eight".