687504 has 20 divisors (see below), whose sum is σ = 1776176. Its totient is φ = 229152.

The previous prime is 687499. The next prime is 687517. The reversal of 687504 is 405786.

It is a happy number.

687504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 687504.

It is an unprimeable number.

687504 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7114 + ... + 7209.

2⁶⁸⁷⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

687504 is an abundant number, since it is smaller than the sum of its proper divisors (1088672).

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

687504 is a wasteful number, since it uses less digits than its factorization.

687504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14334 (or 14328 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 687504 is about 829.1586096761. The cubic root of 687504 is about 88.2588795512.

The spelling of 687504 in words is "six hundred eighty-seven thousand, five hundred four".