687316672 has 28 divisors (see below), whose sum is σ = 1558737040. Its totient is φ = 294564096.

The previous prime is 687316657. The next prime is 687316691. The reversal of 687316672 is 276613786.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 766647 + ... + 767542.

It is an arithmetic number, because the mean of its divisors is an integer number (55669180).

Almost surely, 2^687316672 is an apocalyptic number.

It is an amenable number.

687316672 is an abundant number, since it is smaller than the sum of its proper divisors (871420368).

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

687316672 is a wasteful number, since it uses less digits than its factorization.

687316672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534208 (or 1534198 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The square root of 687316672 is about 26216.7250433764. The cubic root of 687316672 is about 882.5086269544.

The spelling of 687316672 in words is "six hundred eighty-seven million, three hundred sixteen thousand, six hundred seventy-two".