388111885 has 8 divisors (see below), whose sum is σ = 532267776. Its totient is φ = 266133840.

The previous prime is 388111883. The next prime is 388111903. The reversal of 388111885 is 588111883.

It is a happy number.

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

It is not a de Polignac number, because 388111885 - 2¹ = 388111883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388111883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5544421 + ... + 5544490.

It is an arithmetic number, because the mean of its divisors is an integer number (66533472).

Almost surely, 2^388111885 is an apocalyptic number.

388111885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

388111885 is a deficient number, since it is larger than the sum of its proper divisors (144155891).

388111885 is a wasteful number, since it uses less digits than its factorization.

388111885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11088923.

The product of its digits is 61440, while the sum is 43.

The square root of 388111885 is about 19700.5554490222. Note that the first 3 decimals coincide. The cubic root of 388111885 is about 729.4334034670.

The spelling of 388111885 in words is "three hundred eighty-eight million, one hundred eleven thousand, eight hundred eighty-five".