388889055 has 72 divisors (see below), whose sum is σ = 731776032. Its totient is φ = 190885248.

The previous prime is 388889051. The next prime is 388889063. The reversal of 388889055 is 550988883.

It is not a de Polignac number, because 388889055 - 2² = 388889051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388888992 and 388889010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388889051) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 600742 + ... + 601388.

It is an arithmetic number, because the mean of its divisors is an integer number (10163556).

Almost surely, 2^388889055 is an apocalyptic number.

388889055 is a deficient number, since it is larger than the sum of its proper divisors (342886977).

388889055 is a wasteful number, since it uses less digits than its factorization.

388889055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The square root of 388889055 is about 19720.2701553503. The cubic root of 388889055 is about 729.9199605747.

The spelling of 388889055 in words is "three hundred eighty-eight million, eight hundred eighty-nine thousand, fifty-five".