320642839 has 16 divisors (see below), whose sum is σ = 367234560. Its totient is φ = 277113760.

The previous prime is 320642813. The next prime is 320642849. The reversal of 320642839 is 938246023.

It is not a de Polignac number, because 320642839 - 2²⁵ = 287088407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320642798 and 320642807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320642849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38457 + ... + 46045.

It is an arithmetic number, because the mean of its divisors is an integer number (22952160).

Almost surely, 2^320642839 is an apocalyptic number.

320642839 is a deficient number, since it is larger than the sum of its proper divisors (46591721).

320642839 is a wasteful number, since it uses less digits than its factorization.

320642839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7790.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 320642839 is about 17906.5027015328. The cubic root of 320642839 is about 684.4480886586.

The spelling of 320642839 in words is "three hundred twenty million, six hundred forty-two thousand, eight hundred thirty-nine".