688007700 has 108 divisors (see below), whose sum is σ = 2167340448. Its totient is φ = 182548800.

The previous prime is 688007669. The next prime is 688007701. The reversal of 688007700 is 7700886.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688007701) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 188089 + ... + 191711.

Almost surely, 2^688007700 is an apocalyptic number.

688007700 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 688007700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1083670224).

688007700 is an abundant number, since it is smaller than the sum of its proper divisors (1479332748).

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

688007700 is a wasteful number, since it uses less digits than its factorization.

688007700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854 (or 3844 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 688007700 is about 26229.9008766713. The cubic root of 688007700 is about 882.8042858713.

The spelling of 688007700 in words is "six hundred eighty-eight million, seven thousand, seven hundred".