8165844 has 36 divisors (see below), whose sum is σ = 20840820. Its totient is φ = 2695680.

The previous prime is 8165813. The next prime is 8165867. The reversal of 8165844 is 4485618.

It can be written as a sum of positive squares in 2 ways, for example, as 4410000 + 3755844 = 2100^2 + 1938^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8165799 and 8165808.

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 11 ways as a sum of consecutive naturals, for example, 2884 + ... + 4964.

Almost surely, 2^8165844 is an apocalyptic number.

It is an amenable number.

8165844 is an abundant number, since it is smaller than the sum of its proper divisors (12674976).

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

8165844 is a wasteful number, since it uses less digits than its factorization.

8165844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200 (or 2195 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 8165844 is about 2857.5940929390. The cubic root of 8165844 is about 201.3725917431.

It can be divided in two parts, 8165 and 844, that added together give a palindrome (9009).

The spelling of 8165844 in words is "eight million, one hundred sixty-five thousand, eight hundred forty-four".