313686820 has 12 divisors (see below), whose sum is σ = 658742364. Its totient is φ = 125474720.

The previous prime is 313686803. The next prime is 313686829. The reversal of 313686820 is 28686313.

It can be written as a sum of positive squares in 2 ways, for example, as 36264484 + 277422336 = 6022^2 + 16656^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 313686820.

It is not an unprimeable number, because it can be changed into a prime (313686829) 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, 7842151 + ... + 7842190.

It is an arithmetic number, because the mean of its divisors is an integer number (54895197).

Almost surely, 2^313686820 is an apocalyptic number.

It is an amenable number.

313686820 is an abundant number, since it is smaller than the sum of its proper divisors (345055544).

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

313686820 is a wasteful number, since it uses less digits than its factorization.

313686820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15684350 (or 15684348 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 313686820 is about 17711.2060571831. The cubic root of 313686820 is about 679.4623922652.

The spelling of 313686820 in words is "three hundred thirteen million, six hundred eighty-six thousand, eight hundred twenty".