388670688 has 288 divisors, whose sum is σ = 1357574400. Its totient is φ = 103016448.

The previous prime is 388670687. The next prime is 388670699. The reversal of 388670688 is 886076883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388670687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2796123 + ... + 2796261.

It is an arithmetic number, because the mean of its divisors is an integer number (4713800).

Almost surely, 2^388670688 is an apocalyptic number.

388670688 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388670688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (678787200).

388670688 is an abundant number, since it is smaller than the sum of its proper divisors (968903712).

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

388670688 is a wasteful number, since it uses less digits than its factorization.

388670688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 388670688 is about 19714.7327651176. The cubic root of 388670688 is about 729.7833146833.

The spelling of 388670688 in words is "three hundred eighty-eight million, six hundred seventy thousand, six hundred eighty-eight".