318140 has 12 divisors (see below), whose sum is σ = 668136. Its totient is φ = 127248.

The previous prime is 318137. The next prime is 318161. The reversal of 318140 is 41813.

It is a happy number.

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 318140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7934 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (55678).

2³¹⁸¹⁴⁰ is an apocalyptic number.

It is an amenable number.

318140 is an abundant number, since it is smaller than the sum of its proper divisors (349996).

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

318140 is a wasteful number, since it uses less digits than its factorization.

318140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15916 (or 15914 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 318140 is about 564.0390057434. The cubic root of 318140 is about 68.2662571353.

Adding to 318140 its reverse (41813), we get a palindrome (359953).

The spelling of 318140 in words is "three hundred eighteen thousand, one hundred forty".