688822628 has 24 divisors (see below), whose sum is σ = 1308088320. Its totient is φ = 315488160.

The previous prime is 688822571. The next prime is 688822649. The reversal of 688822628 is 826228886.

It is a super-2 number, since 2×688822628² = 948953225689652768, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 43748 + ... + 57371.

It is an arithmetic number, because the mean of its divisors is an integer number (54503680).

Almost surely, 2^688822628 is an apocalyptic number.

It is an amenable number.

688822628 is a deficient number, since it is larger than the sum of its proper divisors (619265692).

688822628 is a wasteful number, since it uses less digits than its factorization.

688822628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101267 (or 101265 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The square root of 688822628 is about 26245.4306118227. The cubic root of 688822628 is about 883.1527015804.

The spelling of 688822628 in words is "six hundred eighty-eight million, eight hundred twenty-two thousand, six hundred twenty-eight".