687275688 has 64 divisors (see below), whose sum is σ = 1881216000. Its totient is φ = 207506880.

The previous prime is 687275671. The next prime is 687275717. The reversal of 687275688 is 886572786.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70113 + ... + 79311.

It is an arithmetic number, because the mean of its divisors is an integer number (29394000).

Almost surely, 2^687275688 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 687275688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (940608000).

687275688 is an abundant number, since it is smaller than the sum of its proper divisors (1193940312).

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

687275688 is a wasteful number, since it uses less digits than its factorization.

687275688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9502 (or 9498 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The square root of 687275688 is about 26215.9433932865. The cubic root of 687275688 is about 882.4910855726.

The spelling of 687275688 in words is "six hundred eighty-seven million, two hundred seventy-five thousand, six hundred eighty-eight".