3937831668 has 72 divisors (see below), whose sum is σ = 10298602496. Its totient is φ = 1267358400.

The previous prime is 3937831663. The next prime is 3937831717. The reversal of 3937831668 is 8661387393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3937831661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 512898 + ... + 520518.

Almost surely, 2^3937831668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3937831668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5149301248).

3937831668 is an abundant number, since it is smaller than the sum of its proper divisors (6360770828).

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

3937831668 is a wasteful number, since it uses less digits than its factorization.

3937831668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125 (or 8120 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 3937831668 is about 62752.1447282880. The cubic root of 3937831668 is about 1579.1342354043.

The spelling of 3937831668 in words is "three billion, nine hundred thirty-seven million, eight hundred thirty-one thousand, six hundred sixty-eight".