687062688 has 48 divisors (see below), whose sum is σ = 1942276896. Its totient is φ = 211403520.

The previous prime is 687062671. The next prime is 687062741. The reversal of 687062688 is 886260786.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 687062688.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274018 + ... + 276513.

It is an arithmetic number, because the mean of its divisors is an integer number (40464102).

Almost surely, 2^687062688 is an apocalyptic number.

It is an amenable number.

687062688 is an abundant number, since it is smaller than the sum of its proper divisors (1255214208).

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

687062688 is a wasteful number, since it uses less digits than its factorization.

687062688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550557 (or 550549 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 687062688 is about 26211.8806650725. The cubic root of 687062688 is about 882.3999091464.

The spelling of 687062688 in words is "six hundred eighty-seven million, sixty-two thousand, six hundred eighty-eight".