30987488 has 24 divisors (see below), whose sum is σ = 69722352. Its totient is φ = 13280256.

The previous prime is 30987443. The next prime is 30987493. The reversal of 30987488 is 88478903.

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, 68945 + ... + 69392.

It is an arithmetic number, because the mean of its divisors is an integer number (2905098).

Almost surely, 2^30987488 is an apocalyptic number.

It is an amenable number.

30987488 is an abundant number, since it is smaller than the sum of its proper divisors (38734864).

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

30987488 is a wasteful number, since it uses less digits than its factorization.

30987488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138354 (or 138346 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 30987488 is about 5566.6406386617. The cubic root of 30987488 is about 314.0957961597.

The spelling of 30987488 in words is "thirty million, nine hundred eighty-seven thousand, four hundred eighty-eight".