28065129 has 16 divisors (see below), whose sum is σ = 40106112. Its totient is φ = 17411328.

The previous prime is 28065119. The next prime is 28065133. The reversal of 28065129 is 92156082.

It is not a de Polignac number, because 28065129 - 2¹¹ = 28063081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28065129.

It is not an unprimeable number, because it can be changed into a prime (28065119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2944 + ... + 8049.

It is an arithmetic number, because the mean of its divisors is an integer number (2506632).

Almost surely, 2^28065129 is an apocalyptic number.

It is an amenable number.

28065129 is a deficient number, since it is larger than the sum of its proper divisors (12040983).

28065129 is a wasteful number, since it uses less digits than its factorization.

28065129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28065129 is about 5297.6531596548. The cubic root of 28065129 is about 303.8941553554.

The spelling of 28065129 in words is "twenty-eight million, sixty-five thousand, one hundred twenty-nine".