687636932 has 24 divisors (see below), whose sum is σ = 1222755576. Its totient is φ = 338300928.

The previous prime is 687636889. The next prime is 687636997. The reversal of 687636932 is 239636786.

It can be written as a sum of positive squares in 4 ways, for example, as 283787716 + 403849216 = 16846^2 + 20096^2 .

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 7 ways as a sum of consecutive naturals, for example, 130868 + ... + 136020.

It is an arithmetic number, because the mean of its divisors is an integer number (50948149).

Almost surely, 2^687636932 is an apocalyptic number.

It is an amenable number.

687636932 is a deficient number, since it is larger than the sum of its proper divisors (535118644).

687636932 is a wasteful number, since it uses less digits than its factorization.

687636932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687 (or 5685 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 50.

The square root of 687636932 is about 26222.8322650319. The cubic root of 687636932 is about 882.6456760215.

The spelling of 687636932 in words is "six hundred eighty-seven million, six hundred thirty-six thousand, nine hundred thirty-two".