3939644004 has 24 divisors (see below), whose sum is σ = 9406283040. Its totient is φ = 1282674624.

The previous prime is 3939644003. The next prime is 3939644017. The reversal of 3939644004 is 4004469393.

It is not an unprimeable number, because it can be changed into a prime (3939644003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3816969 + ... + 3818000.

It is an arithmetic number, because the mean of its divisors is an integer number (391928460).

Almost surely, 2^3939644004 is an apocalyptic number.

It is an amenable number.

3939644004 is an abundant number, since it is smaller than the sum of its proper divisors (5466639036).

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

3939644004 is a wasteful number, since it uses less digits than its factorization.

3939644004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7635019 (or 7635017 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The square root of 3939644004 is about 62766.5834979091. The cubic root of 3939644004 is about 1579.3764569383.

The spelling of 3939644004 in words is "three billion, nine hundred thirty-nine million, six hundred forty-four thousand, four".