687860608 has 32 divisors (see below), whose sum is σ = 1403781120. Its totient is φ = 335539200.

The previous prime is 687860603. The next prime is 687860611. The reversal of 687860608 is 806068786.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687860603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60288 + ... + 70783.

It is an arithmetic number, because the mean of its divisors is an integer number (43868160).

Almost surely, 2^687860608 is an apocalyptic number.

It is an amenable number.

687860608 is an abundant number, since it is smaller than the sum of its proper divisors (715920512).

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

687860608 is a wasteful number, since it uses less digits than its factorization.

687860608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131126 (or 131114 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 687860608 is about 26227.0968275179. The cubic root of 687860608 is about 882.7413685992.

The spelling of 687860608 in words is "six hundred eighty-seven million, eight hundred sixty thousand, six hundred eight".