316640 has 24 divisors (see below), whose sum is σ = 748440. Its totient is φ = 126592.

The previous prime is 316637. The next prime is 316649. The reversal of 316640 is 46613.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 316640.

It is not an unprimeable number, because it can be changed into a prime (316649) 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, 830 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (31185).

2³¹⁶⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

316640 is an abundant number, since it is smaller than the sum of its proper divisors (431800).

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

316640 is a wasteful number, since it uses less digits than its factorization.

316640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994 (or 1986 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 316640 is about 562.7077394172. The cubic root of 316640 is about 68.1587984242.

The spelling of 316640 in words is "three hundred sixteen thousand, six hundred forty".