320490 has 32 divisors (see below), whose sum is σ = 855360. Its totient is φ = 85392.

The previous prime is 320483. The next prime is 320513. The reversal of 320490 is 94023.

320490 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

320490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 324 + ... + 863.

It is an arithmetic number, because the mean of its divisors is an integer number (26730).

2³²⁰⁴⁹⁰ is an apocalyptic number.

320490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320490 is an abundant number, since it is smaller than the sum of its proper divisors (534870).

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

320490 is a wasteful number, since it uses less digits than its factorization.

320490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 320490 is about 566.1183621823. The cubic root of 320490 is about 68.4339320715.

The spelling of 320490 in words is "three hundred twenty thousand, four hundred ninety".