2138388328 has 32 divisors (see below), whose sum is σ = 4101730560. Its totient is φ = 1044671040.

The previous prime is 2138388313. The next prime is 2138388359. The reversal of 2138388328 is 8238838312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232750 + ... + 241762.

It is an arithmetic number, because the mean of its divisors is an integer number (128179080).

Almost surely, 2^2138388328 is an apocalyptic number.

It is an amenable number.

2138388328 is a deficient number, since it is larger than the sum of its proper divisors (1963342232).

2138388328 is a wasteful number, since it uses less digits than its factorization.

2138388328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9697 (or 9693 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 2138388328 is about 46242.7110796934. The cubic root of 2138388328 is about 1288.3351573687.

The spelling of 2138388328 in words is "two billion, one hundred thirty-eight million, three hundred eighty-eight thousand, three hundred twenty-eight".