315820 has 12 divisors (see below), whose sum is σ = 663264. Its totient is φ = 126320.

The previous prime is 315811. The next prime is 315829. The reversal of 315820 is 28513.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (315811) and next prime (315829).

It is not an unprimeable number, because it can be changed into a prime (315829) 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, 7876 + ... + 7915.

It is an arithmetic number, because the mean of its divisors is an integer number (55272).

2³¹⁵⁸²⁰ is an apocalyptic number.

It is an amenable number.

315820 is an abundant number, since it is smaller than the sum of its proper divisors (347444).

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

315820 is a wasteful number, since it uses less digits than its factorization.

315820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15800 (or 15798 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 315820 is about 561.9786472812. The cubic root of 315820 is about 68.0999108016.

The spelling of 315820 in words is "three hundred fifteen thousand, eight hundred twenty".