3930991660 has 12 divisors (see below), whose sum is σ = 8255082528. Its totient is φ = 1572396656.

The previous prime is 3930991637. The next prime is 3930991661. The reversal of 3930991660 is 661990393.

It is a self number, because there is not a number n which added to its sum of digits gives 3930991660.

It is not an unprimeable number, because it can be changed into a prime (3930991661) 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, 98274772 + ... + 98274811.

It is an arithmetic number, because the mean of its divisors is an integer number (687923544).

Almost surely, 2^3930991660 is an apocalyptic number.

It is an amenable number.

3930991660 is an abundant number, since it is smaller than the sum of its proper divisors (4324090868).

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

3930991660 is a wasteful number, since it uses less digits than its factorization.

3930991660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196549592 (or 196549590 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 3930991660 is about 62697.6208480035. The cubic root of 3930991660 is about 1578.2193875304.

The spelling of 3930991660 in words is "three billion, nine hundred thirty million, nine hundred ninety-one thousand, six hundred sixty".