685654728 has 48 divisors (see below), whose sum is σ = 1884141840. Its totient is φ = 207773280.

The previous prime is 685654703. The next prime is 685654747. The reversal of 685654728 is 827456586.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 115150 + ... + 120957.

It is an arithmetic number, because the mean of its divisors is an integer number (39252955).

Almost surely, 2^685654728 is an apocalyptic number.

It is an amenable number.

685654728 is an abundant number, since it is smaller than the sum of its proper divisors (1198487112).

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

685654728 is a wasteful number, since it uses less digits than its factorization.

685654728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236138 (or 236123 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The square root of 685654728 is about 26185.0096047338. The cubic root of 685654728 is about 881.7967456529.

The spelling of 685654728 in words is "six hundred eighty-five million, six hundred fifty-four thousand, seven hundred twenty-eight".