687560 has 16 divisors (see below), whose sum is σ = 1547100. Its totient is φ = 275008.

The previous prime is 687559. The next prime is 687581. The reversal of 687560 is 65786.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 24964 = 814^2 + 158^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8555 + ... + 8634.

2⁶⁸⁷⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

687560 is an abundant number, since it is smaller than the sum of its proper divisors (859540).

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

687560 is a wasteful number, since it uses less digits than its factorization.

687560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17200 (or 17196 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 687560 is about 829.1923781608. The cubic root of 687560 is about 88.2612758345.

The spelling of 687560 in words is "six hundred eighty-seven thousand, five hundred sixty".