688798432 has 24 divisors (see below), whose sum is σ = 1549796976. Its totient is φ = 295199232.

The previous prime is 688798423. The next prime is 688798433. The reversal of 688798432 is 234897886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688798433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1537273 + ... + 1537720.

It is an arithmetic number, because the mean of its divisors is an integer number (64574874).

Almost surely, 2^688798432 is an apocalyptic number.

It is an amenable number.

688798432 is an abundant number, since it is smaller than the sum of its proper divisors (860998544).

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

688798432 is a wasteful number, since it uses less digits than its factorization.

688798432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075010 (or 3075002 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The square root of 688798432 is about 26244.9696513446. The cubic root of 688798432 is about 883.1423607408.

The spelling of 688798432 in words is "six hundred eighty-eight million, seven hundred ninety-eight thousand, four hundred thirty-two".