685005040 has 40 divisors (see below), whose sum is σ = 1631489328. Its totient is φ = 267317760.

The previous prime is 685005037. The next prime is 685005053. The reversal of 685005040 is 40500586.

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

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 101142 + ... + 107701.

Almost surely, 2^685005040 is an apocalyptic number.

It is an amenable number.

685005040 is an abundant number, since it is smaller than the sum of its proper divisors (946484288).

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

685005040 is a wasteful number, since it uses less digits than its factorization.

685005040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208897 (or 208891 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 685005040 is about 26172.6009406784. The cubic root of 685005040 is about 881.5181439102.

The spelling of 685005040 in words is "six hundred eighty-five million, five thousand, forty".