28038165 has 16 divisors (see below), whose sum is σ = 44930688. Its totient is φ = 14930496.

The previous prime is 28038163. The next prime is 28038169. The reversal of 28038165 is 56183082.

It is a happy number.

It is not a de Polignac number, because 28038165 - 2¹ = 28038163 is a prime.

It is a super-2 number, since 2×28038165² = 1572277393134450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28038163) 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 15 ways as a sum of consecutive naturals, for example, 13539 + ... + 15471.

It is an arithmetic number, because the mean of its divisors is an integer number (2808168).

Almost surely, 2^28038165 is an apocalyptic number.

It is an amenable number.

28038165 is a deficient number, since it is larger than the sum of its proper divisors (16892523).

28038165 is a wasteful number, since it uses less digits than its factorization.

28038165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2908.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 28038165 is about 5295.1076476310. The cubic root of 28038165 is about 303.7968005247.

It can be divided in two parts, 28038 and 165, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 28038165 in words is "twenty-eight million, thirty-eight thousand, one hundred sixty-five".