809441982 has 48 divisors (see below), whose sum is σ = 1769040000. Its totient is φ = 267481152.

The previous prime is 809441981. The next prime is 809441987. The reversal of 809441982 is 289144908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809441981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1689619 + ... + 1690097.

It is an arithmetic number, because the mean of its divisors is an integer number (36855000).

Almost surely, 2^809441982 is an apocalyptic number.

809441982 is an abundant number, since it is smaller than the sum of its proper divisors (959598018).

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

809441982 is a wasteful number, since it uses less digits than its factorization.

809441982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 809441982 is about 28450.6938755455. The cubic root of 809441982 is about 931.9556419113.

The spelling of 809441982 in words is "eight hundred nine million, four hundred forty-one thousand, nine hundred eighty-two".