388686 has 8 divisors (see below), whose sum is σ = 777384. Its totient is φ = 129560.

The previous prime is 388673. The next prime is 388691. The reversal of 388686 is 686883.

388686 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

388686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

388686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32385 + ... + 32396.

It is an arithmetic number, because the mean of its divisors is an integer number (97173).

2³⁸⁸⁶⁸⁶ is an apocalyptic number.

388686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

388686 is a wasteful number, since it uses less digits than its factorization.

388686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64786.

The product of its digits is 55296, while the sum is 39.

The square root of 388686 is about 623.4468702303. The cubic root of 388686 is about 72.9792898028.

The spelling of 388686 in words is "three hundred eighty-eight thousand, six hundred eighty-six".