388643879386 has 8 divisors (see below), whose sum is σ = 666246650400. Its totient is φ = 166561662588.

The previous prime is 388643879381. The next prime is 388643879389. The reversal of 388643879386 is 683978346883.

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

It is not an unprimeable number, because it can be changed into a prime (388643879381) 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, 13880138536 + ... + 13880138563.

It is an arithmetic number, because the mean of its divisors is an integer number (83280831300).

Almost surely, 2^388643879386 is an apocalyptic number.

388643879386 is a deficient number, since it is larger than the sum of its proper divisors (277602771014).

388643879386 is a wasteful number, since it uses less digits than its factorization.

388643879386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27760277108.

The product of its digits is 1003290624, while the sum is 73.

The spelling of 388643879386 in words is "three hundred eighty-eight billion, six hundred forty-three million, eight hundred seventy-nine thousand, three hundred eighty-six".