313640 has 16 divisors (see below), whose sum is σ = 705780. Its totient is φ = 125440.

The previous prime is 313639. The next prime is 313661. The reversal of 313640 is 46313.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 6724 = 554^2 + 82^2 .

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 313640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3881 + ... + 3960.

2³¹³⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

313640 is an abundant number, since it is smaller than the sum of its proper divisors (392140).

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

313640 is a wasteful number, since it uses less digits than its factorization.

313640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7852 (or 7848 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 313640 is about 560.0357131469. The cubic root of 313640 is about 67.9428585710.

Adding to 313640 its reverse (46313), we get a palindrome (359953).

The spelling of 313640 in words is "three hundred thirteen thousand, six hundred forty".