28282193 has 4 divisors (see below), whose sum is σ = 28573860. Its totient is φ = 27990528.

The previous prime is 28282159. The next prime is 28282217. The reversal of 28282193 is 39128282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39128282 = 2 ⋅19564141.

It can be written as a sum of positive squares in 2 ways, for example, as 7333264 + 20948929 = 2708^2 + 4577^2 .

It is a cyclic number.

It is not a de Polignac number, because 28282193 - 2²⁰ = 27233617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28282103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145688 + ... + 145881.

It is an arithmetic number, because the mean of its divisors is an integer number (7143465).

Almost surely, 2^28282193 is an apocalyptic number.

It is an amenable number.

28282193 is a deficient number, since it is larger than the sum of its proper divisors (291667).

28282193 is an equidigital number, since it uses as much as digits as its factorization.

28282193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291666.

The product of its digits is 13824, while the sum is 35.

The square root of 28282193 is about 5318.1005067599. The cubic root of 28282193 is about 304.6756131922.

The spelling of 28282193 in words is "twenty-eight million, two hundred eighty-two thousand, one hundred ninety-three".