3688718538 has 16 divisors (see below), whose sum is σ = 7397991360. Its totient is φ = 1226147136.

The previous prime is 3688718513. The next prime is 3688718549. The reversal of 3688718538 is 8358178863.

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, 854095 + ... + 858402.

It is an arithmetic number, because the mean of its divisors is an integer number (462374460).

Almost surely, 2^3688718538 is an apocalyptic number.

3688718538 is an abundant number, since it is smaller than the sum of its proper divisors (3709272822).

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

3688718538 is a wasteful number, since it uses less digits than its factorization.

3688718538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712861.

The product of its digits is 7741440, while the sum is 57.

The square root of 3688718538 is about 60734.8214618270. The cubic root of 3688718538 is about 1545.1068080034.

The spelling of 3688718538 in words is "three billion, six hundred eighty-eight million, seven hundred eighteen thousand, five hundred thirty-eight".