320859 has 24 divisors (see below), whose sum is σ = 579072. Its totient is φ = 166320.

The previous prime is 320851. The next prime is 320861. The reversal of 320859 is 958023.

It is not a de Polignac number, because 320859 - 2³ = 320851 is a prime.

320859 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320859.

It is not an unprimeable number, because it can be changed into a prime (320851) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 462 + ... + 924.

It is an arithmetic number, because the mean of its divisors is an integer number (24128).

2³²⁰⁸⁵⁹ is an apocalyptic number.

320859 is a deficient number, since it is larger than the sum of its proper divisors (258213).

320859 is a wasteful number, since it uses less digits than its factorization.

320859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 320859 is about 566.4441720064. Note that the first 3 decimals coincide. The cubic root of 320859 is about 68.4601860738.

The spelling of 320859 in words is "three hundred twenty thousand, eight hundred fifty-nine".