388945404 has 18 divisors (see below), whose sum is σ = 983167640. Its totient is φ = 129648456.

The previous prime is 388945343. The next prime is 388945411. The reversal of 388945404 is 404549883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 388945404.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 5401984 + ... + 5402055.

Almost surely, 2^388945404 is an apocalyptic number.

It is an amenable number.

388945404 is an abundant number, since it is smaller than the sum of its proper divisors (594222236).

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

388945404 is a wasteful number, since it uses less digits than its factorization.

388945404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10804049 (or 10804044 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The square root of 388945404 is about 19721.6988112079. The cubic root of 388945404 is about 729.9552133654.

The spelling of 388945404 in words is "three hundred eighty-eight million, nine hundred forty-five thousand, four hundred four".