318320 has 40 divisors (see below), whose sum is σ = 776736. Its totient is φ = 121088.

The previous prime is 318319. The next prime is 318323. The reversal of 318320 is 23813.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318320.

It is not an unprimeable number, because it can be changed into a prime (318323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1754 + ... + 1926.

2³¹⁸³²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388368).

318320 is an abundant number, since it is smaller than the sum of its proper divisors (458416).

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

318320 is a wasteful number, since it uses less digits than its factorization.

318320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 318320 is about 564.1985466128. The cubic root of 318320 is about 68.2791294656.

The spelling of 318320 in words is "three hundred eighteen thousand, three hundred twenty".