3990789872 has 40 divisors (see below), whose sum is σ = 7807312800. Its totient is φ = 1976083200.

The previous prime is 3990789857. The next prime is 3990789893. The reversal of 3990789872 is 2789870993.

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, 840818 + ... + 845550.

It is an arithmetic number, because the mean of its divisors is an integer number (195182820).

Almost surely, 2^3990789872 is an apocalyptic number.

It is an amenable number.

3990789872 is a deficient number, since it is larger than the sum of its proper divisors (3816522928).

3990789872 is a wasteful number, since it uses less digits than its factorization.

3990789872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241 (or 5235 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 62.

The square root of 3990789872 is about 63172.6987867386. The cubic root of 3990789872 is about 1586.1817684360.

The spelling of 3990789872 in words is "three billion, nine hundred ninety million, seven hundred eighty-nine thousand, eight hundred seventy-two".