388888887 has 8 divisors (see below), whose sum is σ = 520391536. Its totient is φ = 258322752.

The previous prime is 388888867. The next prime is 388888891. The reversal of 388888887 is 788888883.

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

It is not a de Polignac number, because 388888887 - 2¹² = 388884791 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 (388888867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233158 + ... + 234819.

It is an arithmetic number, because the mean of its divisors is an integer number (65048942).

Almost surely, 2^388888887 is an apocalyptic number.

388888887 is a deficient number, since it is larger than the sum of its proper divisors (131502649).

388888887 is a wasteful number, since it uses less digits than its factorization.

388888887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468257.

The product of its digits is 44040192, while the sum is 66.

The square root of 388888887 is about 19720.2658957733. The cubic root of 388888887 is about 729.9198554662.

The spelling of 388888887 in words is "three hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-seven".