3996908638 has 8 divisors (see below), whose sum is σ = 5996179800. Its totient is φ = 1998182040.

The previous prime is 3996908599. The next prime is 3996908659. The reversal of 3996908638 is 8368096993.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 117268 + ... + 147463.

It is an arithmetic number, because the mean of its divisors is an integer number (749522475).

Almost surely, 2^3996908638 is an apocalyptic number.

3996908638 is a deficient number, since it is larger than the sum of its proper divisors (1999271162).

3996908638 is a wasteful number, since it uses less digits than its factorization.

3996908638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272282.

The product of its (nonzero) digits is 15116544, while the sum is 61.

The square root of 3996908638 is about 63221.1091171295. The cubic root of 3996908638 is about 1586.9920106346.

The spelling of 3996908638 in words is "three billion, nine hundred ninety-six million, nine hundred eight thousand, six hundred thirty-eight".