28329193 has 4 divisors (see below), whose sum is σ = 28793668. Its totient is φ = 27864720.

The previous prime is 28329181. The next prime is 28329229. The reversal of 28329193 is 39192382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39192382 = 2 ⋅19596191.

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 14845609 = 3672^2 + 3853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28329193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28321193) 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 3 ways as a sum of consecutive naturals, for example, 232146 + ... + 232267.

It is an arithmetic number, because the mean of its divisors is an integer number (7198417).

Almost surely, 2^28329193 is an apocalyptic number.

It is an amenable number.

28329193 is a deficient number, since it is larger than the sum of its proper divisors (464475).

28329193 is an equidigital number, since it uses as much as digits as its factorization.

28329193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464474.

The product of its digits is 23328, while the sum is 37.

The square root of 28329193 is about 5322.5175434187. The cubic root of 28329193 is about 304.8442921066.

The spelling of 28329193 in words is "twenty-eight million, three hundred twenty-nine thousand, one hundred ninety-three".