28115065 has 16 divisors (see below), whose sum is σ = 38076480. Its totient is φ = 19741120.

The previous prime is 28115063. The next prime is 28115081. The reversal of 28115065 is 56051182.

It is not a de Polignac number, because 28115065 - 2¹ = 28115063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28115063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 7219 + ... + 10408.

It is an arithmetic number, because the mean of its divisors is an integer number (2379780).

Almost surely, 2^28115065 is an apocalyptic number.

It is an amenable number.

28115065 is a deficient number, since it is larger than the sum of its proper divisors (9961415).

28115065 is a wasteful number, since it uses less digits than its factorization.

28115065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17672.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 28115065 is about 5302.3640953824. The cubic root of 28115065 is about 304.0742871604.

The spelling of 28115065 in words is "twenty-eight million, one hundred fifteen thousand, sixty-five".