28274393 has 16 divisors (see below), whose sum is σ = 33116160. Its totient is φ = 23640336.

The previous prime is 28274381. The next prime is 28274431. The reversal of 28274393 is 39347282.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28274393 - 2⁴ = 28274377 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28274353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91946 + ... + 92252.

It is an arithmetic number, because the mean of its divisors is an integer number (2069760).

Almost surely, 2^28274393 is an apocalyptic number.

It is an amenable number.

28274393 is a deficient number, since it is larger than the sum of its proper divisors (4841767).

28274393 is a wasteful number, since it uses less digits than its factorization.

28274393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596.

The product of its digits is 72576, while the sum is 38.

The square root of 28274393 is about 5317.3671116446. The cubic root of 28274393 is about 304.6476015939.

The spelling of 28274393 in words is "twenty-eight million, two hundred seventy-four thousand, three hundred ninety-three".