685696032 has 72 divisors (see below), whose sum is σ = 2228518656. Its totient is φ = 195912576.

The previous prime is 685696031. The next prime is 685696057. The reversal of 685696032 is 230696586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (685696031) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 168048 + ... + 172079.

It is an arithmetic number, because the mean of its divisors is an integer number (30951648).

Almost surely, 2^685696032 is an apocalyptic number.

It is an amenable number.

685696032 is an abundant number, since it is smaller than the sum of its proper divisors (1542822624).

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

685696032 is a wasteful number, since it uses less digits than its factorization.

685696032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340150 (or 340139 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 685696032 is about 26185.7982883853. The cubic root of 685696032 is about 881.8144518443.

The spelling of 685696032 in words is "six hundred eighty-five million, six hundred ninety-six thousand, thirty-two".