30875317840 has 20 divisors (see below), whose sum is σ = 71785114164. Its totient is φ = 12350127104.

The previous prime is 30875317817. The next prime is 30875317867. The reversal of 30875317840 is 4871357803.

It can be written as a sum of positive squares in 2 ways, for example, as 17825454144 + 13049863696 = 133512^2 + 114236^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 192970657 + ... + 192970816.

Almost surely, 2^30875317840 is an apocalyptic number.

It is an amenable number.

30875317840 is an abundant number, since it is smaller than the sum of its proper divisors (40909796324).

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

30875317840 is a wasteful number, since it uses less digits than its factorization.

30875317840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385941486 (or 385941480 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 30875317840 in words is "thirty billion, eight hundred seventy-five million, three hundred seventeen thousand, eight hundred forty".