685865376 has 72 divisors (see below), whose sum is σ = 2229069024. Its totient is φ = 195960960.

The previous prime is 685865371. The next prime is 685865393. The reversal of 685865376 is 673568586.

685865376 is a `hidden beast` number, since 6 + 8 + 586 + 53 + 7 + 6 = 666.

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

It is a super-2 number, since 2×685865376² = 940822627991242752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (685865371) 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, 168090 + ... + 172121.

It is an arithmetic number, because the mean of its divisors is an integer number (30959292).

Almost surely, 2^685865376 is an apocalyptic number.

It is an amenable number.

685865376 is an abundant number, since it is smaller than the sum of its proper divisors (1543203648).

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

685865376 is a wasteful number, since it uses less digits than its factorization.

685865376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340234 (or 340223 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The square root of 685865376 is about 26189.0315972164. The cubic root of 685865376 is about 881.8870387672.

The spelling of 685865376 in words is "six hundred eighty-five million, eight hundred sixty-five thousand, three hundred seventy-six".