30987732 has 12 divisors (see below), whose sum is σ = 72304736. Its totient is φ = 10329240.

The previous prime is 30987703. The next prime is 30987769. The reversal of 30987732 is 23778903.

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, 1291144 + ... + 1291167.

Almost surely, 2^30987732 is an apocalyptic number.

It is an amenable number.

30987732 is an abundant number, since it is smaller than the sum of its proper divisors (41317004).

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

30987732 is a wasteful number, since it uses less digits than its factorization.

30987732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582318 (or 2582316 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 30987732 is about 5566.6625548887. The cubic root of 30987732 is about 314.0966205695.

The spelling of 30987732 in words is "thirty million, nine hundred eighty-seven thousand, seven hundred thirty-two".