689433804 has 36 divisors (see below), whose sum is σ = 1747441696. Its totient is φ = 229190688.

The previous prime is 689433779. The next prime is 689433847. The reversal of 689433804 is 408334986.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 689433804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12244 + ... + 39099.

Almost surely, 2^689433804 is an apocalyptic number.

It is an amenable number.

689433804 is an abundant number, since it is smaller than the sum of its proper divisors (1058007892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689433804 is a wasteful number, since it uses less digits than its factorization.

689433804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51726 (or 51721 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 689433804 is about 26257.0715046442. The cubic root of 689433804 is about 883.4138245232.

The spelling of 689433804 in words is "six hundred eighty-nine million, four hundred thirty-three thousand, eight hundred four".