685760688 has 80 divisors (see below), whose sum is σ = 2084196960. Its totient is φ = 215138304.

The previous prime is 685760687. The next prime is 685760731. The reversal of 685760688 is 886067586.

685760688 is a `hidden beast` number, since 6 + 8 + 576 + 0 + 68 + 8 = 666.

685760688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (685760687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39345 + ... + 54032.

It is an arithmetic number, because the mean of its divisors is an integer number (26052462).

Almost surely, 2^685760688 is an apocalyptic number.

685760688 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

685760688 is an abundant number, since it is smaller than the sum of its proper divisors (1398436272).

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

685760688 is a wasteful number, since it uses less digits than its factorization.

685760688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93411 (or 93399 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The square root of 685760688 is about 26187.0328216085. The cubic root of 685760688 is about 881.8421671392.

The spelling of 685760688 in words is "six hundred eighty-five million, seven hundred sixty thousand, six hundred eighty-eight".