30390680 has 32 divisors (see below), whose sum is σ = 69973200. Its totient is φ = 11872896.

The previous prime is 30390649. The next prime is 30390691. The reversal of 30390680 is 8609303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7115 + ... + 10554.

Almost surely, 2^30390680 is an apocalyptic number.

It is an amenable number.

30390680 is an abundant number, since it is smaller than the sum of its proper divisors (39582520).

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

30390680 is a wasteful number, since it uses less digits than its factorization.

30390680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17723 (or 17719 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 30390680 is about 5512.7742562162. The cubic root of 30390680 is about 312.0662526409.

Adding to 30390680 its reverse (8609303), we get a palindrome (38999983).

The spelling of 30390680 in words is "thirty million, three hundred ninety thousand, six hundred eighty".