687156764 has 12 divisors (see below), whose sum is σ = 1374313584. Its totient is φ = 294495744.

The previous prime is 687156749. The next prime is 687156797. The reversal of 687156764 is 467651786.

687156764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

687156764 is an admirable number.

It is a congruent number.

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, 12270629 + ... + 12270684.

It is an arithmetic number, because the mean of its divisors is an integer number (114526132).

Almost surely, 2^687156764 is an apocalyptic number.

It is an amenable number.

687156764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

687156764 is a wasteful number, since it uses less digits than its factorization.

687156764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24541324 (or 24541322 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The square root of 687156764 is about 26213.6751334108. The cubic root of 687156764 is about 882.4401814858.

The spelling of 687156764 in words is "six hundred eighty-seven million, one hundred fifty-six thousand, seven hundred sixty-four".