3915881538 has 16 divisors (see below), whose sum is σ = 7832516160. Its totient is φ = 1305168336.

The previous prime is 3915881509. The next prime is 3915881581. The reversal of 3915881538 is 8351885193.

3915881538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 54156 + ... + 103752.

It is an arithmetic number, because the mean of its divisors is an integer number (489532260).

Almost surely, 2^3915881538 is an apocalyptic number.

3915881538 is an abundant number, since it is smaller than the sum of its proper divisors (3916634622).

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

3915881538 is a wasteful number, since it uses less digits than its factorization.

3915881538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62761.

The product of its digits is 1036800, while the sum is 51.

The square root of 3915881538 is about 62577.0048660049. The cubic root of 3915881538 is about 1576.1946475661.

The spelling of 3915881538 in words is "three billion, nine hundred fifteen million, eight hundred eighty-one thousand, five hundred thirty-eight".