687328502 has 16 divisors (see below), whose sum is σ = 1210123680. Its totient is φ = 286607808.

The previous prime is 687328487. The next prime is 687328597. The reversal of 687328502 is 205823786.

It is a self number, because there is not a number n which added to its sum of digits gives 687328502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662927 + ... + 663962.

It is an arithmetic number, because the mean of its divisors is an integer number (75632730).

Almost surely, 2^687328502 is an apocalyptic number.

687328502 is a deficient number, since it is larger than the sum of its proper divisors (522795178).

687328502 is a wasteful number, since it uses less digits than its factorization.

687328502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326935.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 687328502 is about 26216.9506617379. The cubic root of 687328502 is about 882.5136901310.

The spelling of 687328502 in words is "six hundred eighty-seven million, three hundred twenty-eight thousand, five hundred two".