30680816 has 20 divisors (see below), whose sum is σ = 60024432. Its totient is φ = 15190656.

The previous prime is 30680813. The next prime is 30680831. The reversal of 30680816 is 61808603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30680813) 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, 7661 + ... + 10956.

Almost surely, 2^30680816 is an apocalyptic number.

It is an amenable number.

30680816 is a deficient number, since it is larger than the sum of its proper divisors (29343616).

30680816 is a wasteful number, since it uses less digits than its factorization.

30680816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18728 (or 18722 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 30680816 is about 5539.0266292915. The cubic root of 30680816 is about 313.0561947643.

The spelling of 30680816 in words is "thirty million, six hundred eighty thousand, eight hundred sixteen".