8165728 has 12 divisors (see below), whose sum is σ = 16076340. Its totient is φ = 4082848.

The previous prime is 8165723. The next prime is 8165753. The reversal of 8165728 is 8275618.

It is a super-2 number, since 2×8165728² = 133358227539968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8165723) 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, 127558 + ... + 127621.

It is an arithmetic number, because the mean of its divisors is an integer number (1339695).

Almost surely, 2^8165728 is an apocalyptic number.

It is an amenable number.

8165728 is a deficient number, since it is larger than the sum of its proper divisors (7910612).

8165728 is a wasteful number, since it uses less digits than its factorization.

8165728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255189 (or 255181 counting only the distinct ones).

The product of its digits is 26880, while the sum is 37.

The square root of 8165728 is about 2857.5737960725. The cubic root of 8165728 is about 201.3716382049.

The spelling of 8165728 in words is "eight million, one hundred sixty-five thousand, seven hundred twenty-eight".