687706872 has 16 divisors (see below), whose sum is σ = 1719267240. Its totient is φ = 229235616.

The previous prime is 687706861. The next prime is 687706889. The reversal of 687706872 is 278607786.

It is a congruent number.

It is an unprimeable number.

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, 14327203 + ... + 14327250.

Almost surely, 2^687706872 is an apocalyptic number.

It is an amenable number.

687706872 is an abundant number, since it is smaller than the sum of its proper divisors (1031560368).

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

687706872 is a wasteful number, since it uses less digits than its factorization.

687706872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28654462 (or 28654458 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 51.

The square root of 687706872 is about 26224.1658017943. The cubic root of 687706872 is about 882.6755998291.

The spelling of 687706872 in words is "six hundred eighty-seven million, seven hundred six thousand, eight hundred seventy-two".