30391880688 has 240 divisors, whose sum is σ = 94876594176. Its totient is φ = 9018708480.

The previous prime is 30391880677. The next prime is 30391880707. The reversal of 30391880688 is 88608819303.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21297031 + ... + 21298457.

Almost surely, 2^30391880688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30391880688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47438297088).

30391880688 is an abundant number, since it is smaller than the sum of its proper divisors (64484713488).

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

30391880688 is a wasteful number, since it uses less digits than its factorization.

30391880688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852 (or 1843 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 30391880688 in words is "thirty billion, three hundred ninety-one million, eight hundred eighty thousand, six hundred eighty-eight".