321385638 has 32 divisors (see below), whose sum is σ = 742178304. Its totient is φ = 90876672.

The previous prime is 321385613. The next prime is 321385643. The reversal of 321385638 is 836583123.

321385638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 321385596 and 321385605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35370 + ... + 43517.

It is an arithmetic number, because the mean of its divisors is an integer number (23193072).

Almost surely, 2^321385638 is an apocalyptic number.

321385638 is an abundant number, since it is smaller than the sum of its proper divisors (420792666).

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

321385638 is a wasteful number, since it uses less digits than its factorization.

321385638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78996.

The product of its digits is 103680, while the sum is 39.

The square root of 321385638 is about 17927.2317439141. The cubic root of 321385638 is about 684.9762103021.

The spelling of 321385638 in words is "three hundred twenty-one million, three hundred eighty-five thousand, six hundred thirty-eight".