689226656 has 24 divisors (see below), whose sum is σ = 1357513920. Its totient is φ = 344461248.

The previous prime is 689226649. The next prime is 689226677. The reversal of 689226656 is 656622986.

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, 116375 + ... + 122153.

It is an arithmetic number, because the mean of its divisors is an integer number (56563080).

Almost surely, 2^689226656 is an apocalyptic number.

It is an amenable number.

689226656 is a deficient number, since it is larger than the sum of its proper divisors (668287264).

689226656 is a wasteful number, since it uses less digits than its factorization.

689226656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516 (or 9508 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 50.

The square root of 689226656 is about 26253.1265947506. The cubic root of 689226656 is about 883.3253385139.

The spelling of 689226656 in words is "six hundred eighty-nine million, two hundred twenty-six thousand, six hundred fifty-six".