320290 has 8 divisors (see below), whose sum is σ = 576540. Its totient is φ = 128112.

The previous prime is 320273. The next prime is 320291. The reversal of 320290 is 92023.

It can be written as a sum of positive squares in 2 ways, for example, as 263169 + 57121 = 513^2 + 239^2 .

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

It is not an unprimeable number, because it can be changed into a prime (320291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16005 + ... + 16024.

2³²⁰²⁹⁰ is an apocalyptic number.

320290 is a deficient number, since it is larger than the sum of its proper divisors (256250).

320290 is a wasteful number, since it uses less digits than its factorization.

320290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32036.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 320290 is about 565.9416931098. The cubic root of 320290 is about 68.4196938379.

The spelling of 320290 in words is "three hundred twenty thousand, two hundred ninety".