28018265 has 16 divisors (see below), whose sum is σ = 37863936. Its totient is φ = 19718400.

The previous prime is 28018259. The next prime is 28018279. The reversal of 28018265 is 56281082.

It is not a de Polignac number, because 28018265 - 2⁸ = 28018009 is a prime.

It is a super-2 number, since 2×28018265² = 1570046347220450, which contains 22 as substring.

It is an unprimeable number.

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, 6512 + ... + 9921.

It is an arithmetic number, because the mean of its divisors is an integer number (2366496).

Almost surely, 2^28018265 is an apocalyptic number.

It is an amenable number.

28018265 is a deficient number, since it is larger than the sum of its proper divisors (9845671).

28018265 is a wasteful number, since it uses less digits than its factorization.

28018265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16480.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 28018265 is about 5293.2282210387. The cubic root of 28018265 is about 303.7249105709.

The spelling of 28018265 in words is "twenty-eight million, eighteen thousand, two hundred sixty-five".