8161844 has 6 divisors (see below), whose sum is σ = 14283234. Its totient is φ = 4080920.

The previous prime is 8161843. The next prime is 8161859. The reversal of 8161844 is 4481618.

It can be written as a sum of positive squares in only one way, i.e., 6697744 + 1464100 = 2588^2 + 1210^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8161844.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020227 + ... + 1020234.

It is an arithmetic number, because the mean of its divisors is an integer number (2380539).

Almost surely, 2^8161844 is an apocalyptic number.

It is an amenable number.

8161844 is a deficient number, since it is larger than the sum of its proper divisors (6121390).

8161844 is a wasteful number, since it uses less digits than its factorization.

8161844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040465 (or 2040463 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 8161844 is about 2856.8941177440. The cubic root of 8161844 is about 201.3397059028.

The spelling of 8161844 in words is "eight million, one hundred sixty-one thousand, eight hundred forty-four".