689256608 has 24 divisors (see below), whose sum is σ = 1368989748. Its totient is φ = 341576704.

The previous prime is 689256577. The next prime is 689256637. The reversal of 689256608 is 806652986.

It can be written as a sum of positive squares in 2 ways, for example, as 627602704 + 61653904 = 25052^2 + 7852^2 .

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 3 ways as a sum of consecutive naturals, for example, 91691 + ... + 98922.

Almost surely, 2^689256608 is an apocalyptic number.

It is an amenable number.

689256608 is a deficient number, since it is larger than the sum of its proper divisors (679733140).

689256608 is a wasteful number, since it uses less digits than its factorization.

689256608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190736 (or 190728 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The square root of 689256608 is about 26253.6970348940. The cubic root of 689256608 is about 883.3381340034.

The spelling of 689256608 in words is "six hundred eighty-nine million, two hundred fifty-six thousand, six hundred eight".