685075328 has 32 divisors (see below), whose sum is σ = 1559771760. Its totient is φ = 293603328.

The previous prime is 685075301. The next prime is 685075397. The reversal of 685075328 is 823570586.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 381401 + ... + 383192.

Almost surely, 2^685075328 is an apocalyptic number.

It is an amenable number.

685075328 is an abundant number, since it is smaller than the sum of its proper divisors (874696432).

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

685075328 is an equidigital number, since it uses as much as digits as its factorization.

685075328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764614 (or 764602 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 685075328 is about 26173.9436845119. The cubic root of 685075328 is about 881.5482935804.

The spelling of 685075328 in words is "six hundred eighty-five million, seventy-five thousand, three hundred twenty-eight".