687885328 has 20 divisors (see below), whose sum is σ = 1435299628. Its totient is φ = 317485440.

The previous prime is 687885313. The next prime is 687885347. The reversal of 687885328 is 823588786.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 357663744 + 330221584 = 18912^2 + 18172^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653363 + ... + 1653778.

Almost surely, 2^687885328 is an apocalyptic number.

It is an amenable number.

687885328 is an abundant number, since it is smaller than the sum of its proper divisors (747414300).

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

687885328 is a wasteful number, since it uses less digits than its factorization.

687885328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307162 (or 3307156 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 55.

The square root of 687885328 is about 26227.5680916093. The cubic root of 687885328 is about 882.7519429825.

The spelling of 687885328 in words is "six hundred eighty-seven million, eight hundred eighty-five thousand, three hundred twenty-eight".