388868644 has 12 divisors (see below), whose sum is σ = 683109504. Its totient is φ = 193694504.

The previous prime is 388868621. The next prime is 388868657. The reversal of 388868644 is 446868883.

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, 183772 + ... + 185875.

It is an arithmetic number, because the mean of its divisors is an integer number (56925792).

Almost surely, 2^388868644 is an apocalyptic number.

It is an amenable number.

388868644 is a deficient number, since it is larger than the sum of its proper divisors (294240860).

388868644 is a wasteful number, since it uses less digits than its factorization.

388868644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369914 (or 369912 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 55.

The square root of 388868644 is about 19719.7526353654. The cubic root of 388868644 is about 729.9071903027.

The spelling of 388868644 in words is "three hundred eighty-eight million, eight hundred sixty-eight thousand, six hundred forty-four".