320085813 has 8 divisors (see below), whose sum is σ = 426894048. Its totient is φ = 213334064.

The previous prime is 320085767. The next prime is 320085869. The reversal of 320085813 is 318580023.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 320085813 - 2⁹ = 320085301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320085613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606 + ... + 25352.

It is an arithmetic number, because the mean of its divisors is an integer number (53361756).

Almost surely, 2^320085813 is an apocalyptic number.

It is an amenable number.

320085813 is a deficient number, since it is larger than the sum of its proper divisors (106808235).

320085813 is a wasteful number, since it uses less digits than its factorization.

320085813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28243.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 320085813 is about 17890.9422054849. The cubic root of 320085813 is about 684.0515141087.

The spelling of 320085813 in words is "three hundred twenty million, eighty-five thousand, eight hundred thirteen".