388645 has 8 divisors (see below), whose sum is σ = 491040. Its totient is φ = 294480.

The previous prime is 388621. The next prime is 388651. The reversal of 388645 is 546883.

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

It is not a de Polignac number, because 388645 - 2⁹ = 388133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 388645.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1951 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (61380).

2³⁸⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

388645 is a deficient number, since it is larger than the sum of its proper divisors (102395).

388645 is a wasteful number, since it uses less digits than its factorization.

388645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115.

The product of its digits is 23040, while the sum is 34.

The square root of 388645 is about 623.4139876519. The cubic root of 388645 is about 72.9767236731.

The spelling of 388645 in words is "three hundred eighty-eight thousand, six hundred forty-five".