688501832 has 12 divisors (see below), whose sum is σ = 1291080105. Its totient is φ = 344213808.

The previous prime is 688501823. The next prime is 688501861. The reversal of 688501832 is 238105886.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 609398596 + 79103236 = 24686^2 + 8894^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18554.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 688501832.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 69578 + ... + 78854.

Almost surely, 2^688501832 is an apocalyptic number.

It is an amenable number.

688501832 is a deficient number, since it is larger than the sum of its proper divisors (602578273).

688501832 is an frugal number, since it uses more digits than its factorization.

688501832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18560 (or 9279 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 688501832 is about 26239.3184362704. The cubic root of 688501832 is about 883.0155807238.

The spelling of 688501832 in words is "six hundred eighty-eight million, five hundred one thousand, eight hundred thirty-two".