320618 has 4 divisors (see below), whose sum is σ = 480930. Its totient is φ = 160308.

The previous prime is 320611. The next prime is 320627. The reversal of 320618 is 816023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 273529 + 47089 = 523^2 + 217^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 320618.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320618.

It is not an unprimeable number, because it can be changed into a prime (320611) by changing a digit.

320618 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80153 + ... + 80156.

2³²⁰⁶¹⁸ is an apocalyptic number.

320618 is a deficient number, since it is larger than the sum of its proper divisors (160312).

320618 is a wasteful number, since it uses less digits than its factorization.

320618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160311.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 320618 is about 566.2314014606. The cubic root of 320618 is about 68.4430414325.

The spelling of 320618 in words is "three hundred twenty thousand, six hundred eighteen".