30680384 has 28 divisors (see below), whose sum is σ = 69579744. Its totient is φ = 13148544.

The previous prime is 30680357. The next prime is 30680399. The reversal of 30680384 is 48308603.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 30680384.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33794 + ... + 34689.

Almost surely, 2^30680384 is an apocalyptic number.

It is an amenable number.

30680384 is an abundant number, since it is smaller than the sum of its proper divisors (38899360).

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

30680384 is an equidigital number, since it uses as much as digits as its factorization.

30680384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68502 (or 68492 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 30680384 is about 5538.9876331330. The cubic root of 30680384 is about 313.0547254324.

Adding to 30680384 its reverse (48308603), we get a palindrome (78988987).

The spelling of 30680384 in words is "thirty million, six hundred eighty thousand, three hundred eighty-four".