388565885 has 4 divisors (see below), whose sum is σ = 466279068. Its totient is φ = 310852704.

The previous prime is 388565857. The next prime is 388565921. The reversal of 388565885 is 588565883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 222516889 + 166048996 = 14917^2 + 12886^2 .

It is a cyclic number.

It is not a de Polignac number, because 388565885 - 2¹⁶ = 388500349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388565885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38856584 + ... + 38856593.

It is an arithmetic number, because the mean of its divisors is an integer number (116569767).

Almost surely, 2^388565885 is an apocalyptic number.

It is an amenable number.

388565885 is a deficient number, since it is larger than the sum of its proper divisors (77713183).

388565885 is an equidigital number, since it uses as much as digits as its factorization.

388565885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77713182.

The product of its digits is 9216000, while the sum is 56.

The square root of 388565885 is about 19712.0745990877. The cubic root of 388565885 is about 729.7177147134.

The spelling of 388565885 in words is "three hundred eighty-eight million, five hundred sixty-five thousand, eight hundred eighty-five".