809689344 has 72 divisors (see below), whose sum is σ = 2159445120. Its totient is φ = 269334528.

The previous prime is 809689327. The next prime is 809689357. The reversal of 809689344 is 443986908.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543769 + ... + 545255.

Almost surely, 2^809689344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809689344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1079722560).

809689344 is an abundant number, since it is smaller than the sum of its proper divisors (1349755776).

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

809689344 is a wasteful number, since it uses less digits than its factorization.

809689344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2215 (or 2201 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 809689344 is about 28455.0407485212. The cubic root of 809689344 is about 932.0505661255.

The spelling of 809689344 in words is "eight hundred nine million, six hundred eighty-nine thousand, three hundred forty-four".