320018 has 4 divisors (see below), whose sum is σ = 480030. Its totient is φ = 160008.

The previous prime is 320011. The next prime is 320027. The reversal of 320018 is 810023.

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., 162409 + 157609 = 403^2 + 397^2 .

It is a junction number, because it is equal to n+sod(n) for n = 319984 and 320011.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320018.

It is not an unprimeable number, because it can be changed into a prime (320011) by changing a digit.

320018 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80003 + ... + 80006.

2³²⁰⁰¹⁸ is an apocalyptic number.

320018 is a deficient number, since it is larger than the sum of its proper divisors (160012).

320018 is a wasteful number, since it uses less digits than its factorization.

320018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160011.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 320018 is about 565.7013346281. The cubic root of 320018 is about 68.4003203250.

It can be divided in two parts, 3200 and 18, that multiplied together give a square (57600 = 240²).

The spelling of 320018 in words is "three hundred twenty thousand, eighteen".