687785360 has 20 divisors (see below), whose sum is σ = 1599101148. Its totient is φ = 275114112.

The previous prime is 687785327. The next prime is 687785363. The reversal of 687785360 is 63587786.

687785360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 196897024 + 490888336 = 14032^2 + 22156^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 687785299 and 687785308.

It is not an unprimeable number, because it can be changed into a prime (687785363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298579 + ... + 4298738.

Almost surely, 2^687785360 is an apocalyptic number.

It is an amenable number.

687785360 is an abundant number, since it is smaller than the sum of its proper divisors (911315788).

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

687785360 is a wasteful number, since it uses less digits than its factorization.

687785360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8597330 (or 8597324 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 50.

The square root of 687785360 is about 26225.6622414001. The cubic root of 687785360 is about 882.7091784800.

The spelling of 687785360 in words is "six hundred eighty-seven million, seven hundred eighty-five thousand, three hundred sixty".