809684442 has 96 divisors (see below), whose sum is σ = 2050064640. Its totient is φ = 226195200.

The previous prime is 809684429. The next prime is 809684471. The reversal of 809684442 is 244486908.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1154692 + ... + 1155392.

It is an arithmetic number, because the mean of its divisors is an integer number (21354840).

Almost surely, 2^809684442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809684442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025032320).

809684442 is an abundant number, since it is smaller than the sum of its proper divisors (1240380198).

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

809684442 is a wasteful number, since it uses less digits than its factorization.

809684442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 809684442 is about 28454.9546125099. The cubic root of 809684442 is about 932.0486851897.

The spelling of 809684442 in words is "eight hundred nine million, six hundred eighty-four thousand, four hundred forty-two".