30881384 has 72 divisors (see below), whose sum is σ = 66671190. Its totient is φ = 13395456.

The previous prime is 30881371. The next prime is 30881407. The reversal of 30881384 is 48318803.

It can be written as a sum of positive squares in 3 ways, for example, as 30360100 + 521284 = 5510^2 + 722^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 834614 + ... + 834650.

Almost surely, 2^30881384 is an apocalyptic number.

30881384 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

30881384 is an abundant number, since it is smaller than the sum of its proper divisors (35789806).

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

30881384 is a wasteful number, since it uses less digits than its factorization.

30881384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 30881384 is about 5557.1021225095. The cubic root of 30881384 is about 313.7368886020.

The spelling of 30881384 in words is "thirty million, eight hundred eighty-one thousand, three hundred eighty-four".