3939785824 has 48 divisors (see below), whose sum is σ = 8381871792. Its totient is φ = 1812100608.

The previous prime is 3939785813. The next prime is 3939785891. The reversal of 3939785824 is 4285879393.

It is a congruent 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, 105727 + ... + 138049.

It is an arithmetic number, because the mean of its divisors is an integer number (174622329).

Almost surely, 2^3939785824 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 3939785824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4190935896).

3939785824 is an abundant number, since it is smaller than the sum of its proper divisors (4442085968).

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

3939785824 is a wasteful number, since it uses less digits than its factorization.

3939785824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32639 (or 32631 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 58.

The square root of 3939785824 is about 62767.7132290161. The cubic root of 3939785824 is about 1579.3954082683.

The spelling of 3939785824 in words is "three billion, nine hundred thirty-nine million, seven hundred eighty-five thousand, eight hundred twenty-four".