687084684 has 96 divisors (see below), whose sum is σ = 1889879040. Its totient is φ = 191539200.

The previous prime is 687084667. The next prime is 687084691. The reversal of 687084684 is 486480786.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 739132 + ... + 740060.

It is an arithmetic number, because the mean of its divisors is an integer number (19686240).

Almost surely, 2^687084684 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 687084684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944939520).

687084684 is an abundant number, since it is smaller than the sum of its proper divisors (1202794356).

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

687084684 is a wasteful number, since it uses less digits than its factorization.

687084684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1389 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The square root of 687084684 is about 26212.3002424434. The cubic root of 687084684 is about 882.4093255900.

The spelling of 687084684 in words is "six hundred eighty-seven million, eighty-four thousand, six hundred eighty-four".