687397338 has 24 divisors (see below), whose sum is σ = 1494455508. Its totient is φ = 228348672.

The previous prime is 687397327. The next prime is 687397351. The reversal of 687397338 is 833793786.

It can be written as a sum of positive squares in 2 ways, for example, as 430853049 + 256544289 = 20757^2 + 16017^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59895 + ... + 70442.

Almost surely, 2^687397338 is an apocalyptic number.

687397338 is an abundant number, since it is smaller than the sum of its proper divisors (807058170).

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

687397338 is a wasteful number, since it uses less digits than its factorization.

687397338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130638 (or 130635 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 54.

The square root of 687397338 is about 26218.2634436379. The cubic root of 687397338 is about 882.5431504179.

The spelling of 687397338 in words is "six hundred eighty-seven million, three hundred ninety-seven thousand, three hundred thirty-eight".