809339444 has 24 divisors (see below), whose sum is σ = 1468524288. Its totient is φ = 389877120.

The previous prime is 809339441. The next prime is 809339459. The reversal of 809339444 is 444933908.

It is a super-2 number, since 2×809339444² = 1310060671228458272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 809339395 and 809339404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809339441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13772 + ... + 42524.

It is an arithmetic number, because the mean of its divisors is an integer number (61188512).

Almost surely, 2^809339444 is an apocalyptic number.

It is an amenable number.

809339444 is a deficient number, since it is larger than the sum of its proper divisors (659184844).

809339444 is a wasteful number, since it uses less digits than its factorization.

809339444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29015 (or 29013 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 809339444 is about 28448.8917886093. The cubic root of 809339444 is about 931.9162876791.

The spelling of 809339444 in words is "eight hundred nine million, three hundred thirty-nine thousand, four hundred forty-four".