687348688 has 30 divisors (see below), whose sum is σ = 1442065254. Its totient is φ = 317236608.

The previous prime is 687348677. The next prime is 687348703. The reversal of 687348688 is 886843786.

It can be written as a sum of positive squares in 3 ways, for example, as 96275344 + 591073344 = 9812^2 + 24312^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124395 + ... + 129802.

Almost surely, 2^687348688 is an apocalyptic number.

It is an amenable number.

687348688 is an abundant number, since it is smaller than the sum of its proper divisors (754716566).

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

687348688 is a wasteful number, since it uses less digits than its factorization.

687348688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254231 (or 254212 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 58.

The square root of 687348688 is about 26217.3356388478. The cubic root of 687348688 is about 882.5223294968.

The spelling of 687348688 in words is "six hundred eighty-seven million, three hundred forty-eight thousand, six hundred eighty-eight".