689784872 has 16 divisors (see below), whose sum is σ = 1478110560. Its totient is φ = 295622064.

The previous prime is 689784857. The next prime is 689784919. The reversal of 689784872 is 278487986.

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, 6158738 + ... + 6158849.

It is an arithmetic number, because the mean of its divisors is an integer number (92381910).

Almost surely, 2^689784872 is an apocalyptic number.

It is an amenable number.

689784872 is an abundant number, since it is smaller than the sum of its proper divisors (788325688).

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

689784872 is a wasteful number, since it uses less digits than its factorization.

689784872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12317600 (or 12317596 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 59.

The square root of 689784872 is about 26263.7558624048. The cubic root of 689784872 is about 883.5637473998.

The spelling of 689784872 in words is "six hundred eighty-nine million, seven hundred eighty-four thousand, eight hundred seventy-two".