3899788128 has 36 divisors (see below), whose sum is σ = 11090023308. Its totient is φ = 1299929280.

The previous prime is 3899788093. The next prime is 3899788129. The reversal of 3899788128 is 8218879983.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3899788129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6770178 + ... + 6770753.

It is an arithmetic number, because the mean of its divisors is an integer number (308056203).

Almost surely, 2^3899788128 is an apocalyptic number.

It is an amenable number.

3899788128 is an abundant number, since it is smaller than the sum of its proper divisors (7190235180).

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

3899788128 is a wasteful number, since it uses less digits than its factorization.

3899788128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13540947 (or 13540936 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 63.

The square root of 3899788128 is about 62448.2836273344. The cubic root of 3899788128 is about 1574.0324118901.

The spelling of 3899788128 in words is "three billion, eight hundred ninety-nine million, seven hundred eighty-eight thousand, one hundred twenty-eight".