30977968 has 20 divisors (see below), whose sum is σ = 68594320. Its totient is φ = 13276224.

The previous prime is 30977953. The next prime is 30977977. The reversal of 30977968 is 86977903.

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, 138183 + ... + 138406.

It is an arithmetic number, because the mean of its divisors is an integer number (3429716).

Almost surely, 2^30977968 is an apocalyptic number.

It is an amenable number.

30977968 is an abundant number, since it is smaller than the sum of its proper divisors (37616352).

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

30977968 is a wasteful number, since it uses less digits than its factorization.

30977968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276604 (or 276598 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 30977968 is about 5565.7854791575. The cubic root of 30977968 is about 314.0636272808.

The spelling of 30977968 in words is "thirty million, nine hundred seventy-seven thousand, nine hundred sixty-eight".