28790193 has 4 divisors (see below), whose sum is σ = 38386928. Its totient is φ = 19193460.

The previous prime is 28790191. The next prime is 28790213. The reversal of 28790193 is 39109782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28790193 - 2¹ = 28790191 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28790191) 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, 4798363 + ... + 4798368.

It is an arithmetic number, because the mean of its divisors is an integer number (9596732).

Almost surely, 2^28790193 is an apocalyptic number.

It is an amenable number.

28790193 is a deficient number, since it is larger than the sum of its proper divisors (9596735).

28790193 is an equidigital number, since it uses as much as digits as its factorization.

28790193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9596734.

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 28790193 is about 5365.6493549243. The cubic root of 28790193 is about 306.4889764306.

The spelling of 28790193 in words is "twenty-eight million, seven hundred ninety thousand, one hundred ninety-three".