686335344 has 80 divisors (see below), whose sum is σ = 1842739200. Its totient is φ = 219858688.

The previous prime is 686335303. The next prime is 686335379. The reversal of 686335344 is 443533686.

It is a junction number, because it is equal to n+sod(n) for n = 686335296 and 686335305.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 331657 + ... + 333719.

It is an arithmetic number, because the mean of its divisors is an integer number (23034240).

Almost surely, 2^686335344 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 686335344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (921369600).

686335344 is an abundant number, since it is smaller than the sum of its proper divisors (1156403856).

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

686335344 is a wasteful number, since it uses less digits than its factorization.

686335344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2336 counting only the distinct ones).

The product of its digits is 622080, while the sum is 42.

The square root of 686335344 is about 26198.0026719596. The cubic root of 686335344 is about 882.0884213676.

The spelling of 686335344 in words is "six hundred eighty-six million, three hundred thirty-five thousand, three hundred forty-four".