28808165 has 16 divisors (see below), whose sum is σ = 36359280. Its totient is φ = 21880320.

The previous prime is 28808159. The next prime is 28808177. The reversal of 28808165 is 56180882.

It can be written as a sum of positive squares in 8 ways, for example, as 749956 + 28058209 = 866^2 + 5297^2 .

It is not a de Polignac number, because 28808165 - 2¹⁶ = 28742629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7217 + ... + 10473.

It is an arithmetic number, because the mean of its divisors is an integer number (2272455).

Almost surely, 2^28808165 is an apocalyptic number.

It is an amenable number.

28808165 is a deficient number, since it is larger than the sum of its proper divisors (7551115).

28808165 is a wasteful number, since it uses less digits than its factorization.

28808165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 28808165 is about 5367.3238210490. The cubic root of 28808165 is about 306.5527374265.

The spelling of 28808165 in words is "twenty-eight million, eight hundred eight thousand, one hundred sixty-five".