688085936 has 20 divisors (see below), whose sum is σ = 1349231352. Its totient is φ = 339897216.

The previous prime is 688085933. The next prime is 688085953. The reversal of 688085936 is 639580886.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (688085933) 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 in 3 ways as a sum of consecutive naturals, for example, 257741 + ... + 260396.

Almost surely, 2^688085936 is an apocalyptic number.

It is an amenable number.

688085936 is a deficient number, since it is larger than the sum of its proper divisors (661145416).

688085936 is a wasteful number, since it uses less digits than its factorization.

688085936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518228 (or 518222 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The square root of 688085936 is about 26231.3921856999. The cubic root of 688085936 is about 882.8377469592.

The spelling of 688085936 in words is "six hundred eighty-eight million, eighty-five thousand, nine hundred thirty-six".