388976885 has 12 divisors (see below), whose sum is σ = 513064524. Its totient is φ = 282891840.

The previous prime is 388976831. The next prime is 388976891. The reversal of 388976885 is 588679883.

It can be written as a sum of positive squares in 2 ways, for example, as 171060241 + 217916644 = 13079^2 + 14762^2 .

It is not a de Polignac number, because 388976885 - 2⁶ = 388976821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320864 + ... + 322073.

It is an arithmetic number, because the mean of its divisors is an integer number (42755377).

Almost surely, 2^388976885 is an apocalyptic number.

It is an amenable number.

388976885 is a deficient number, since it is larger than the sum of its proper divisors (124087639).

388976885 is a wasteful number, since it uses less digits than its factorization.

388976885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642964 (or 642953 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 62.

The square root of 388976885 is about 19722.4969260994. The cubic root of 388976885 is about 729.9749068750.

The spelling of 388976885 in words is "three hundred eighty-eight million, nine hundred seventy-six thousand, eight hundred eighty-five".