28075191 has 4 divisors (see below), whose sum is σ = 37433592. Its totient is φ = 18716792.

The previous prime is 28075169. The next prime is 28075199. The reversal of 28075191 is 19157082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28075191 - 2²¹ = 25978039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075199) 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, 4679196 + ... + 4679201.

It is an arithmetic number, because the mean of its divisors is an integer number (9358398).

Almost surely, 2^28075191 is an apocalyptic number.

28075191 is a deficient number, since it is larger than the sum of its proper divisors (9358401).

28075191 is an equidigital number, since it uses as much as digits as its factorization.

28075191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9358400.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 28075191 is about 5298.6027403458. The cubic root of 28075191 is about 303.9304687182.

The spelling of 28075191 in words is "twenty-eight million, seventy-five thousand, one hundred ninety-one".