688228824 has 32 divisors (see below), whose sum is σ = 1746256320. Its totient is φ = 225985056.

The previous prime is 688228813. The next prime is 688228831. The reversal of 688228824 is 428822886.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212394 + ... + 215609.

It is an arithmetic number, because the mean of its divisors is an integer number (54570510).

Almost surely, 2^688228824 is an apocalyptic number.

It is an amenable number.

688228824 is an abundant number, since it is smaller than the sum of its proper divisors (1058027496).

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

688228824 is a wasteful number, since it uses less digits than its factorization.

688228824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428079 (or 428075 counting only the distinct ones).

The product of its digits is 786432, while the sum is 48.

The square root of 688228824 is about 26234.1156511898. The cubic root of 688228824 is about 882.8988527903.

It can be divided in two parts, 68822882 and 4, that added together give a palindrome (68822886).

The spelling of 688228824 in words is "six hundred eighty-eight million, two hundred twenty-eight thousand, eight hundred twenty-four".