318644 has 12 divisors (see below), whose sum is σ = 572964. Its totient is φ = 154944.

The previous prime is 318641. The next prime is 318653. The reversal of 318644 is 446813.

It can be written as a sum of positive squares in 2 ways, for example, as 150544 + 168100 = 388^2 + 410^2 .

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 318644.

It is not an unprimeable number, because it can be changed into a prime (318641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929 + ... + 1224.

It is an arithmetic number, because the mean of its divisors is an integer number (47747).

2³¹⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

318644 is a deficient number, since it is larger than the sum of its proper divisors (254320).

318644 is a wasteful number, since it uses less digits than its factorization.

318644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2194 (or 2192 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 318644 is about 564.4856065481. The cubic root of 318644 is about 68.3022874371.

The spelling of 318644 in words is "three hundred eighteen thousand, six hundred forty-four".