30840928 has 12 divisors (see below), whose sum is σ = 60718140. Its totient is φ = 15420448.

The previous prime is 30840919. The next prime is 30840947. The reversal of 30840928 is 82904803.

It is a junction number, because it is equal to n+sod(n) for n = 30840893 and 30840902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 481858 + ... + 481921.

It is an arithmetic number, because the mean of its divisors is an integer number (5059845).

Almost surely, 2^30840928 is an apocalyptic number.

It is an amenable number.

30840928 is a deficient number, since it is larger than the sum of its proper divisors (29877212).

30840928 is an equidigital number, since it uses as much as digits as its factorization.

30840928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963789 (or 963781 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 30840928 is about 5553.4609028965. The cubic root of 30840928 is about 313.5998255934.

The spelling of 30840928 in words is "thirty million, eight hundred forty thousand, nine hundred twenty-eight".