3947087636 has 12 divisors (see below), whose sum is σ = 7054369728. Its totient is φ = 1931553432.

The previous prime is 3947087621. The next prime is 3947087647. The reversal of 3947087636 is 6367807493.

3947087636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10497386 + ... + 10497761.

It is an arithmetic number, because the mean of its divisors is an integer number (587864144).

Almost surely, 2^3947087636 is an apocalyptic number.

It is an amenable number.

3947087636 is a deficient number, since it is larger than the sum of its proper divisors (3107282092).

3947087636 is a wasteful number, since it uses less digits than its factorization.

3947087636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20995198 (or 20995196 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 53.

The square root of 3947087636 is about 62825.8516535988. The cubic root of 3947087636 is about 1580.3705315891.

The spelling of 3947087636 in words is "three billion, nine hundred forty-seven million, eighty-seven thousand, six hundred thirty-six".