3929981990 has 48 divisors (see below), whose sum is σ = 7956449424. Its totient is φ = 1395831360.

The previous prime is 3929981971. The next prime is 3929982019. The reversal of 3929981990 is 991899293.

3929981990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14264 + ... + 89796.

It is an arithmetic number, because the mean of its divisors is an integer number (165759363).

Almost surely, 2^3929981990 is an apocalyptic number.

3929981990 is an abundant number, since it is smaller than the sum of its proper divisors (4026467434).

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

3929981990 is a wasteful number, since it uses less digits than its factorization.

3929981990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75605 (or 75594 counting only the distinct ones).

The product of its (nonzero) digits is 2834352, while the sum is 59.

The square root of 3929981990 is about 62689.5684304813. The cubic root of 3929981990 is about 1578.0842547739.

The spelling of 3929981990 in words is "three billion, nine hundred twenty-nine million, nine hundred eighty-one thousand, nine hundred ninety".