687885672 has 16 divisors (see below), whose sum is σ = 1719714240. Its totient is φ = 229295216.

The previous prime is 687885641. The next prime is 687885677. The reversal of 687885672 is 276588786.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (687885677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14330928 + ... + 14330975.

It is an arithmetic number, because the mean of its divisors is an integer number (107482140).

Almost surely, 2^687885672 is an apocalyptic number.

It is an amenable number.

687885672 is an abundant number, since it is smaller than the sum of its proper divisors (1031828568).

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

687885672 is a wasteful number, since it uses less digits than its factorization.

687885672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28661912 (or 28661908 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 57.

The square root of 687885672 is about 26227.5746495935. The cubic root of 687885672 is about 882.7520901323.

The spelling of 687885672 in words is "six hundred eighty-seven million, eight hundred eighty-five thousand, six hundred seventy-two".