689435456 has 28 divisors (see below), whose sum is σ = 1370429568. Its totient is φ = 344130432.

The previous prime is 689435437. The next prime is 689435471. The reversal of 689435456 is 654534986.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29975 + ... + 47721.

Almost surely, 2^689435456 is an apocalyptic number.

It is an amenable number.

689435456 is a deficient number, since it is larger than the sum of its proper divisors (680994112).

689435456 is a wasteful number, since it uses less digits than its factorization.

689435456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18366 (or 18356 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The square root of 689435456 is about 26257.1029628175. The cubic root of 689435456 is about 883.4145301256.

The spelling of 689435456 in words is "six hundred eighty-nine million, four hundred thirty-five thousand, four hundred fifty-six".