30311868 has 12 divisors (see below), whose sum is σ = 70727720. Its totient is φ = 10103952.

The previous prime is 30311839. The next prime is 30311881. The reversal of 30311868 is 86811303.

It is a tau number, because it is divible by the number of its divisors (12).

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, 1262983 + ... + 1263006.

Almost surely, 2^30311868 is an apocalyptic number.

It is an amenable number.

30311868 is an abundant number, since it is smaller than the sum of its proper divisors (40415852).

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

30311868 is a wasteful number, since it uses less digits than its factorization.

30311868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525996 (or 2525994 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 30311868 is about 5505.6214908037. The cubic root of 30311868 is about 311.7962591592.

The spelling of 30311868 in words is "thirty million, three hundred eleven thousand, eight hundred sixty-eight".