3993899906 has 32 divisors (see below), whose sum is σ = 6388979328. Its totient is φ = 1868289280.

The previous prime is 3993899779. The next prime is 3993899939. The reversal of 3993899906 is 6099983993.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843626 + ... + 848346.

It is an arithmetic number, because the mean of its divisors is an integer number (199655604).

Almost surely, 2^3993899906 is an apocalyptic number.

3993899906 is a deficient number, since it is larger than the sum of its proper divisors (2395079422).

3993899906 is a wasteful number, since it uses less digits than its factorization.

3993899906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146.

The product of its (nonzero) digits is 25509168, while the sum is 65.

The square root of 3993899906 is about 63197.3093256351. The cubic root of 3993899906 is about 1586.5937001161.

The spelling of 3993899906 in words is "three billion, nine hundred ninety-three million, eight hundred ninety-nine thousand, nine hundred six".