7728165 has 24 divisors (see below), whose sum is σ = 13478400. Its totient is φ = 4096224.

The previous prime is 7728139. The next prime is 7728167. The reversal of 7728165 is 5618277.

It is not a de Polignac number, because 7728165 - 2⁹ = 7727653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7728167) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8524 + ... + 9386.

It is an arithmetic number, because the mean of its divisors is an integer number (561600).

Almost surely, 2^7728165 is an apocalyptic number.

It is an amenable number.

7728165 is a deficient number, since it is larger than the sum of its proper divisors (5750235).

7728165 is a wasteful number, since it uses less digits than its factorization.

7728165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073 (or 1070 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 7728165 is about 2779.9577334916. The cubic root of 7728165 is about 197.7085549968.

The spelling of 7728165 in words is "seven million, seven hundred twenty-eight thousand, one hundred sixty-five".