318020 has 12 divisors (see below), whose sum is σ = 667884. Its totient is φ = 127200.

The previous prime is 318007. The next prime is 318023. The reversal of 318020 is 20813.

It can be written as a sum of positive squares in 2 ways, for example, as 244036 + 73984 = 494^2 + 272^2 .

It is a super-2 number, since 2×318020² = 202273440800, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 317986 and 318004.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318020.

It is not an unprimeable number, because it can be changed into a prime (318023) by changing a digit.

318020 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 in 3 ways as a sum of consecutive naturals, for example, 7931 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (55657).

2³¹⁸⁰²⁰ is an apocalyptic number.

It is an amenable number.

318020 is an abundant number, since it is smaller than the sum of its proper divisors (349864).

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

318020 is a wasteful number, since it uses less digits than its factorization.

318020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15910 (or 15908 counting only the distinct ones).

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

The square root of 318020 is about 563.9326200886. The cubic root of 318020 is about 68.2576728840.

Adding to 318020 its reverse (20813), we get a palindrome (338833).

The spelling of 318020 in words is "three hundred eighteen thousand, twenty".