688374886 has 4 divisors (see below), whose sum is σ = 1032562332. Its totient is φ = 344187442.

The previous prime is 688374851. The next prime is 688374901. The reversal of 688374886 is 688473886.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 688374886.

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, 172093720 + ... + 172093723.

It is an arithmetic number, because the mean of its divisors is an integer number (258140583).

Almost surely, 2^688374886 is an apocalyptic number.

688374886 is a deficient number, since it is larger than the sum of its proper divisors (344187446).

688374886 is a wasteful number, since it uses less digits than its factorization.

688374886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344187445.

The product of its digits is 12386304, while the sum is 58.

The square root of 688374886 is about 26236.8993213756. The cubic root of 688374886 is about 882.9613072367.

The spelling of 688374886 in words is "six hundred eighty-eight million, three hundred seventy-four thousand, eight hundred eighty-six".