685797040 has 40 divisors (see below), whose sum is σ = 1616334048. Its totient is φ = 270558720.

The previous prime is 685797019. The next prime is 685797041. The reversal of 685797040 is 40797586.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (685797041) 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 7 ways as a sum of consecutive naturals, for example, 52876 + ... + 64555.

Almost surely, 2^685797040 is an apocalyptic number.

It is an amenable number.

685797040 is an abundant number, since it is smaller than the sum of its proper divisors (930537008).

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

685797040 is a wasteful number, since it uses less digits than its factorization.

685797040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117517 (or 117511 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 685797040 is about 26187.7268963918. The cubic root of 685797040 is about 881.8577489404.

The spelling of 685797040 in words is "six hundred eighty-five million, seven hundred ninety-seven thousand, forty".