28506193 has 8 divisors (see below), whose sum is σ = 29272320. Its totient is φ = 27743520.

The previous prime is 28506187. The next prime is 28506197. The reversal of 28506193 is 39160582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28506193 - 2¹⁷ = 28375121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28506197) 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 7 ways as a sum of consecutive naturals, for example, 28996 + ... + 29962.

It is an arithmetic number, because the mean of its divisors is an integer number (3659040).

Almost surely, 2^28506193 is an apocalyptic number.

It is an amenable number.

28506193 is a deficient number, since it is larger than the sum of its proper divisors (766127).

28506193 is an equidigital number, since it uses as much as digits as its factorization.

28506193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 28506193 is about 5339.1191221024. The cubic root of 28506193 is about 305.4778606107.

The spelling of 28506193 in words is "twenty-eight million, five hundred six thousand, one hundred ninety-three".