688028252 has 6 divisors (see below), whose sum is σ = 1204049448. Its totient is φ = 344014124.

The previous prime is 688028239. The next prime is 688028281. The reversal of 688028252 is 252820886.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 86003528 + ... + 86003535.

It is an arithmetic number, because the mean of its divisors is an integer number (200674908).

Almost surely, 2^688028252 is an apocalyptic number.

It is an amenable number.

688028252 is a deficient number, since it is larger than the sum of its proper divisors (516021196).

688028252 is a wasteful number, since it uses less digits than its factorization.

688028252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172007067 (or 172007065 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 41.

The square root of 688028252 is about 26230.2926403805. The cubic root of 688028252 is about 882.8130760893.

The spelling of 688028252 in words is "six hundred eighty-eight million, twenty-eight thousand, two hundred fifty-two".