388855920 has 40 divisors (see below), whose sum is σ = 1205454096. Its totient is φ = 103694848.

The previous prime is 388855891. The next prime is 388855921. The reversal of 388855920 is 29558883.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 388855920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388855921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809877 + ... + 810356.

Almost surely, 2^388855920 is an apocalyptic number.

388855920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388855920 is an abundant number, since it is smaller than the sum of its proper divisors (816598176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

388855920 is a wasteful number, since it uses less digits than its factorization.

388855920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620249 (or 1620243 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The square root of 388855920 is about 19719.4300120465. The cubic root of 388855920 is about 729.8992292251.

The spelling of 388855920 in words is "three hundred eighty-eight million, eight hundred fifty-five thousand, nine hundred twenty".