316840 has 24 divisors (see below), whose sum is σ = 720990. Its totient is φ = 125312.

The previous prime is 316819. The next prime is 316847. The reversal of 316840 is 48613.

It can be written as a sum of positive squares in 3 ways, for example, as 155236 + 161604 = 394^2 + 402^2 .

It is not an unprimeable number, because it can be changed into a prime (316847) by changing a digit.

316840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3516 + ... + 3604.

2³¹⁶⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 316840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360495).

316840 is an abundant number, since it is smaller than the sum of its proper divisors (404150).

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

316840 is an equidigital number, since it uses as much as digits as its factorization.

316840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 316840 is about 562.8854235100. The cubic root of 316840 is about 68.1731458330.

It can be divided in two parts, 316 and 840, that added together give a square (1156 = 34²).

The spelling of 316840 in words is "three hundred sixteen thousand, eight hundred forty".