687011868 has 60 divisors (see below), whose sum is σ = 1804089672. Its totient is φ = 227970720.

The previous prime is 687011839. The next prime is 687011869. The reversal of 687011868 is 868110786.

687011868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687011869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68878 + ... + 78218.

Almost surely, 2^687011868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687011868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902044836).

687011868 is an abundant number, since it is smaller than the sum of its proper divisors (1117077804).

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

687011868 is a wasteful number, since it uses less digits than its factorization.

687011868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9584 (or 9573 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 687011868 is about 26210.9112394056. The cubic root of 687011868 is about 882.3781524373.

The spelling of 687011868 in words is "six hundred eighty-seven million, eleven thousand, eight hundred sixty-eight".