688022684 has 12 divisors (see below), whose sum is σ = 1209079200. Its totient is φ = 342571488.

The previous prime is 688022641. The next prime is 688022689. The reversal of 688022684 is 486220886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688022689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358889 + ... + 360800.

It is an arithmetic number, because the mean of its divisors is an integer number (100756600).

Almost surely, 2^688022684 is an apocalyptic number.

It is an amenable number.

688022684 is a deficient number, since it is larger than the sum of its proper divisors (521056516).

688022684 is a wasteful number, since it uses less digits than its factorization.

688022684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719932 (or 719930 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 688022684 is about 26230.1865033400. The cubic root of 688022684 is about 882.8106946384.

The spelling of 688022684 in words is "six hundred eighty-eight million, twenty-two thousand, six hundred eighty-four".