3947128052 has 12 divisors (see below), whose sum is σ = 7894256160. Its totient is φ = 1691626296.

The previous prime is 3947128033. The next prime is 3947128057. The reversal of 3947128052 is 2508217493.

3947128052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

3947128052 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947128057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70484402 + ... + 70484457.

It is an arithmetic number, because the mean of its divisors is an integer number (657854680).

Almost surely, 2^3947128052 is an apocalyptic number.

It is an amenable number.

3947128052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3947128052 is a wasteful number, since it uses less digits than its factorization.

3947128052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140968870 (or 140968868 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 3947128052 is about 62826.1733038071. The cubic root of 3947128052 is about 1580.3759256115.

The spelling of 3947128052 in words is "three billion, nine hundred forty-seven million, one hundred twenty-eight thousand, fifty-two".