686489936 has 40 divisors (see below), whose sum is σ = 1453032000. Its totient is φ = 311601920.

The previous prime is 686489899. The next prime is 686489981. The reversal of 686489936 is 639984686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145340 + ... + 149988.

It is an arithmetic number, because the mean of its divisors is an integer number (36325800).

Almost surely, 2^686489936 is an apocalyptic number.

It is an amenable number.

686489936 is an abundant number, since it is smaller than the sum of its proper divisors (766542064).

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

686489936 is a wasteful number, since it uses less digits than its factorization.

686489936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507 (or 5501 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 59.

The square root of 686489936 is about 26200.9529597685. The cubic root of 686489936 is about 882.1546443772.

The spelling of 686489936 in words is "six hundred eighty-six million, four hundred eighty-nine thousand, nine hundred thirty-six".