687530128 has 20 divisors (see below), whose sum is σ = 1333915120. Its totient is φ = 343293984.

The previous prime is 687530119. The next prime is 687530131. The reversal of 687530128 is 821035786.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17250 + ... + 40897.

It is an arithmetic number, because the mean of its divisors is an integer number (66695756).

Almost surely, 2^687530128 is an apocalyptic number.

It is an amenable number.

687530128 is a deficient number, since it is larger than the sum of its proper divisors (646384992).

687530128 is a wasteful number, since it uses less digits than its factorization.

687530128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58894 (or 58888 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 687530128 is about 26220.7957163775. The cubic root of 687530128 is about 882.5999760474.

The spelling of 687530128 in words is "six hundred eighty-seven million, five hundred thirty thousand, one hundred twenty-eight".