388387909899 has 12 divisors (see below), whose sum is σ = 612005191512. Its totient is φ = 235386612000.

The previous prime is 388387909883. The next prime is 388387909919. The reversal of 388387909899 is 998909783883.

It is not a de Polignac number, because 388387909899 - 2⁴ = 388387909883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (388387909859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1961555002 + ... + 1961555199.

It is an arithmetic number, because the mean of its divisors is an integer number (51000432626).

Almost surely, 2^388387909899 is an apocalyptic number.

388387909899 is a deficient number, since it is larger than the sum of its proper divisors (223617281613).

388387909899 is a wasteful number, since it uses less digits than its factorization.

388387909899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923110218 (or 3923110215 counting only the distinct ones).

The product of its (nonzero) digits is 1693052928, while the sum is 81.

The spelling of 388387909899 in words is "three hundred eighty-eight billion, three hundred eighty-seven million, nine hundred nine thousand, eight hundred ninety-nine".