385663399388 has 48 divisors (see below), whose sum is σ = 714084016800. Its totient is φ = 181745233920.

The previous prime is 385663399343. The next prime is 385663399411. The reversal of 385663399388 is 883993366583.

It is a happy number.

It is a congruent number.

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, 19569956 + ... + 19589652.

It is an arithmetic number, because the mean of its divisors is an integer number (14876750350).

Almost surely, 2^385663399388 is an apocalyptic number.

385663399388 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

385663399388 is a deficient number, since it is larger than the sum of its proper divisors (328420617412).

385663399388 is a wasteful number, since it uses less digits than its factorization.

385663399388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21030 (or 21028 counting only the distinct ones).

The product of its digits is 604661760, while the sum is 71.

The spelling of 385663399388 in words is "three hundred eighty-five billion, six hundred sixty-three million, three hundred ninety-nine thousand, three hundred eighty-eight".