685597344 has 24 divisors (see below), whose sum is σ = 1799693280. Its totient is φ = 228532416.

The previous prime is 685597337. The next prime is 685597357. The reversal of 685597344 is 443795586.

It is a tau number, because it is divible by the number of its divisors (24).

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 3 ways as a sum of consecutive naturals, for example, 3570724 + ... + 3570915.

It is an arithmetic number, because the mean of its divisors is an integer number (74987220).

Almost surely, 2^685597344 is an apocalyptic number.

It is an amenable number.

685597344 is an abundant number, since it is smaller than the sum of its proper divisors (1114095936).

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

685597344 is a wasteful number, since it uses less digits than its factorization.

685597344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7141652 (or 7141644 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The square root of 685597344 is about 26183.9138403715. The cubic root of 685597344 is about 881.7721451098.

The spelling of 685597344 in words is "six hundred eighty-five million, five hundred ninety-seven thousand, three hundred forty-four".