687764752 has 40 divisors (see below), whose sum is σ = 1367995032. Its totient is φ = 334848000.

The previous prime is 687764743. The next prime is 687764773. The reversal of 687764752 is 257467786.

687764752 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 33223696 + 654541056 = 5764^2 + 25584^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 687764752.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95088 + ... + 102064.

Almost surely, 2^687764752 is an apocalyptic number.

It is an amenable number.

687764752 is a deficient number, since it is larger than the sum of its proper divisors (680230280).

687764752 is a wasteful number, since it uses less digits than its factorization.

687764752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147 (or 7141 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 52.

The square root of 687764752 is about 26225.2693408476. The cubic root of 687764752 is about 882.7003622352.

The spelling of 687764752 in words is "six hundred eighty-seven million, seven hundred sixty-four thousand, seven hundred fifty-two".