318809140 has 24 divisors (see below), whose sum is σ = 720999720. Its totient is φ = 117714048.

The previous prime is 318809137. The next prime is 318809201. The reversal of 318809140 is 41908813.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13118884 + 305690256 = 3622^2 + 17484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 318809096 and 318809105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612835 + ... + 613354.

It is an arithmetic number, because the mean of its divisors is an integer number (30041655).

Almost surely, 2^318809140 is an apocalyptic number.

It is an amenable number.

318809140 is an abundant number, since it is smaller than the sum of its proper divisors (402190580).

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

318809140 is a wasteful number, since it uses less digits than its factorization.

318809140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226211 (or 1226209 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 318809140 is about 17855.2272458236. The cubic root of 318809140 is about 683.1408481577.

The spelling of 318809140 in words is "three hundred eighteen million, eight hundred nine thousand, one hundred forty".