688601916 has 36 divisors (see below), whose sum is σ = 1769173224. Its totient is φ = 225770400.

The previous prime is 688601911. The next prime is 688601939. The reversal of 688601916 is 619106886.

It is a happy number.

688601916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688601911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154590 + ... + 158981.

Almost surely, 2^688601916 is an apocalyptic number.

It is an amenable number.

688601916 is an abundant number, since it is smaller than the sum of its proper divisors (1080571308).

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

688601916 is a wasteful number, since it uses less digits than its factorization.

688601916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313642 (or 313637 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 688601916 is about 26241.2255049188. The cubic root of 688601916 is about 883.0583651413.

The spelling of 688601916 in words is "six hundred eighty-eight million, six hundred one thousand, nine hundred sixteen".