1687500328 has 8 divisors (see below), whose sum is σ = 3164063130. Its totient is φ = 843750160.

The previous prime is 1687500323. The next prime is 1687500379. The reversal of 1687500328 is 8230057861.

It can be written as a sum of positive squares in only one way, i.e., 1257269764 + 430230564 = 35458^2 + 20742^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1687500323) by changing a digit.

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 as a sum of consecutive naturals, namely, 105468763 + ... + 105468778.

Almost surely, 2^1687500328 is an apocalyptic number.

It is an amenable number.

1687500328 is a deficient number, since it is larger than the sum of its proper divisors (1476562802).

1687500328 is a wasteful number, since it uses less digits than its factorization.

1687500328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210937547 (or 210937543 counting only the distinct ones).

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

The square root of 1687500328 is about 41079.1958051761. The cubic root of 1687500328 is about 1190.5508661121.

The spelling of 1687500328 in words is "one billion, six hundred eighty-seven million, five hundred thousand, three hundred twenty-eight".