3989128912 has 10 divisors (see below), whose sum is σ = 7728937298. Its totient is φ = 1994564448.

The previous prime is 3989128909. The next prime is 3989128939. The reversal of 3989128912 is 2198219893.

3989128912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3296597056 + 692531856 = 57416^2 + 26316^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3989128912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124660263 + ... + 124660294.

Almost surely, 2^3989128912 is an apocalyptic number.

It is an amenable number.

3989128912 is a deficient number, since it is larger than the sum of its proper divisors (3739808386).

3989128912 is a wasteful number, since it uses less digits than its factorization.

3989128912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249320565 (or 249320559 counting only the distinct ones).

The product of its digits is 559872, while the sum is 52.

The square root of 3989128912 is about 63159.5512333645. The cubic root of 3989128912 is about 1585.9616825097.

The spelling of 3989128912 in words is "three billion, nine hundred eighty-nine million, one hundred twenty-eight thousand, nine hundred twelve".