809883956 has 18 divisors (see below), whose sum is σ = 1648692738. Its totient is φ = 347093040.

The previous prime is 809883929. The next prime is 809883967. The reversal of 809883956 is 659388908.

It can be written as a sum of positive squares in only one way, i.e., 779303056 + 30580900 = 27916^2 + 5530^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2065835 + ... + 2066226.

It is an arithmetic number, because the mean of its divisors is an integer number (91594041).

Almost surely, 2^809883956 is an apocalyptic number.

It is an amenable number.

809883956 is an abundant number, since it is smaller than the sum of its proper divisors (838808782).

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

809883956 is a wasteful number, since it uses less digits than its factorization.

809883956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132079 (or 4132070 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 809883956 is about 28458.4601832214. The cubic root of 809883956 is about 932.1252341430.

The spelling of 809883956 in words is "eight hundred nine million, eight hundred eighty-three thousand, nine hundred fifty-six".