388619988 has 12 divisors (see below), whose sum is σ = 906780000. Its totient is φ = 129539992.

The previous prime is 388619969. The next prime is 388620007. The reversal of 388619988 is 889916883.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (388619969) and next prime (388620007).

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 16192488 + ... + 16192511.

It is an arithmetic number, because the mean of its divisors is an integer number (75565000).

Almost surely, 2^388619988 is an apocalyptic number.

It is an amenable number.

388619988 is an abundant number, since it is smaller than the sum of its proper divisors (518160012).

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

388619988 is a wasteful number, since it uses less digits than its factorization.

388619988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32385006 (or 32385004 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 60.

The square root of 388619988 is about 19713.4468827752. The cubic root of 388619988 is about 729.7515812011.

The spelling of 388619988 in words is "three hundred eighty-eight million, six hundred nineteen thousand, nine hundred eighty-eight".