687877536 has 96 divisors (see below), whose sum is σ = 1874492928. Its totient is φ = 220711680.

The previous prime is 687877517. The next prime is 687877591. The reversal of 687877536 is 635778786.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291915 + ... + 294261.

It is an arithmetic number, because the mean of its divisors is an integer number (19525968).

Almost surely, 2^687877536 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 687877536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937246464).

687877536 is an abundant number, since it is smaller than the sum of its proper divisors (1186615392).

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

687877536 is a wasteful number, since it uses less digits than its factorization.

687877536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474 (or 2466 counting only the distinct ones).

The product of its digits is 11854080, while the sum is 57.

The square root of 687877536 is about 26227.4195452012. The cubic root of 687877536 is about 882.7486098547.

The spelling of 687877536 in words is "six hundred eighty-seven million, eight hundred seventy-seven thousand, five hundred thirty-six".