28338265 has 12 divisors (see below), whose sum is σ = 34392492. Its totient is φ = 22415040.

The previous prime is 28338251. The next prime is 28338281. The reversal of 28338265 is 56283382.

28338265 = T₁₁ + T₁₂ + ... + T₅₅₃.

It can be written as a sum of positive squares in 6 ways, for example, as 6780816 + 21557449 = 2604^2 + 4643^2 .

It is not a de Polignac number, because 28338265 - 2⁷ = 28338137 is a prime.

It is a Duffinian number.

Its product of digits (69120) is a multiple of the sum of its prime factors (540).

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 156475 + ... + 156655.

It is an arithmetic number, because the mean of its divisors is an integer number (2866041).

Almost surely, 2^28338265 is an apocalyptic number.

It is an amenable number.

28338265 is a deficient number, since it is larger than the sum of its proper divisors (6054227).

28338265 is an equidigital number, since it uses as much as digits as its factorization.

28338265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 359 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 28338265 is about 5323.3697034867. The cubic root of 28338265 is about 304.8768292408.

The spelling of 28338265 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred sixty-five".