320790 has 48 divisors (see below), whose sum is σ = 839952. Its totient is φ = 78336.

The previous prime is 320767. The next prime is 320791. The reversal of 320790 is 97023.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8652 + ... + 8688.

It is an arithmetic number, because the mean of its divisors is an integer number (17499).

2³²⁰⁷⁹⁰ is an apocalyptic number.

320790 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 320790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (419976).

320790 is an abundant number, since it is smaller than the sum of its proper divisors (519162).

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

320790 is a wasteful number, since it uses less digits than its factorization.

320790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 320790 is about 566.3832624646. The cubic root of 320790 is about 68.4552783195.

The spelling of 320790 in words is "three hundred twenty thousand, seven hundred ninety".