3938668393 has 8 divisors (see below), whose sum is σ = 4297216896. Its totient is φ = 3580201200.

The previous prime is 3938668381. The next prime is 3938668427.

3938668393 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3938668393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3938668333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128155 + ... + 155887.

It is an arithmetic number, because the mean of its divisors is an integer number (537152112).

Almost surely, 2^3938668393 is an apocalyptic number.

It is an amenable number.

3938668393 is a deficient number, since it is larger than the sum of its proper divisors (358548503).

3938668393 is a wasteful number, since it uses less digits than its factorization.

3938668393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40655.

The product of its digits is 15116544, while the sum is 58.

The square root of 3938668393 is about 62758.8112777800. The cubic root of 3938668393 is about 1579.2460742393.

The spelling of 3938668393 in words is "three billion, nine hundred thirty-eight million, six hundred sixty-eight thousand, three hundred ninety-three".