688528842 has 8 divisors (see below), whose sum is σ = 1377057696. Its totient is φ = 229509612.

The previous prime is 688528823. The next prime is 688528847. The reversal of 688528842 is 248825886.

It is a sphenic number, since it is the product of 3 distinct primes.

688528842 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (688528847) 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, 57377398 + ... + 57377409.

It is an arithmetic number, because the mean of its divisors is an integer number (172132212).

Almost surely, 2^688528842 is an apocalyptic number.

688528842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

688528842 is a wasteful number, since it uses less digits than its factorization.

688528842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114754812.

The product of its digits is 1966080, while the sum is 51.

The square root of 688528842 is about 26239.8331168474. The cubic root of 688528842 is about 883.0271275045.

The spelling of 688528842 in words is "six hundred eighty-eight million, five hundred twenty-eight thousand, eight hundred forty-two".