3864775128 has 64 divisors (see below), whose sum is σ = 9915937920. Its totient is φ = 1254508800.

The previous prime is 3864775111. The next prime is 3864775129. The reversal of 3864775128 is 8215774683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864775129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574263 + ... + 580953.

It is an arithmetic number, because the mean of its divisors is an integer number (154936530).

Almost surely, 2^3864775128 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 3864775128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4957968960).

3864775128 is an abundant number, since it is smaller than the sum of its proper divisors (6051162792).

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

3864775128 is a wasteful number, since it uses less digits than its factorization.

3864775128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7328 (or 7324 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 51.

The square root of 3864775128 is about 62167.3155926810. The cubic root of 3864775128 is about 1569.3075946610.

The spelling of 3864775128 in words is "three billion, eight hundred sixty-four million, seven hundred seventy-five thousand, one hundred twenty-eight".