688938616 has 32 divisors (see below), whose sum is σ = 1338246000. Its totient is φ = 332107776.

The previous prime is 688938559. The next prime is 688938629. The reversal of 688938616 is 616839886.

It is a happy number.

It is a congruent number.

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, 197560 + ... + 201016.

Almost surely, 2^688938616 is an apocalyptic number.

It is an amenable number.

688938616 is a deficient number, since it is larger than the sum of its proper divisors (649307384).

688938616 is a wasteful number, since it uses less digits than its factorization.

688938616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4347 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 688938616 is about 26247.6401986921. The cubic root of 688938616 is about 883.2022689448.

The spelling of 688938616 in words is "six hundred eighty-eight million, nine hundred thirty-eight thousand, six hundred sixteen".