686445312 has 432 divisors, whose sum is σ = 2390744160. Its totient is φ = 173408256.

The previous prime is 686445289. The next prime is 686445313. The reversal of 686445312 is 213544686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686445313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18552558 + ... + 18552594.

It is an arithmetic number, because the mean of its divisors is an integer number (5534130).

Almost surely, 2^686445312 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 686445312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1195372080).

686445312 is an abundant number, since it is smaller than the sum of its proper divisors (1704298848).

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

686445312 is a wasteful number, since it uses less digits than its factorization.

686445312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 95 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 686445312 is about 26200.1013738497. The cubic root of 686445312 is about 882.1355296897.

Adding to 686445312 its reverse (213544686), we get a palindrome (899989998).

The spelling of 686445312 in words is "six hundred eighty-six million, four hundred forty-five thousand, three hundred twelve".