28795791 has 4 divisors (see below), whose sum is σ = 38394392. Its totient is φ = 19197192.

The previous prime is 28795787. The next prime is 28795831. The reversal of 28795791 is 19759782.

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

It is not a de Polignac number, because 28795791 - 2² = 28795787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28795791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28795391) 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, 4799296 + ... + 4799301.

It is an arithmetic number, because the mean of its divisors is an integer number (9598598).

Almost surely, 2^28795791 is an apocalyptic number.

28795791 is a deficient number, since it is larger than the sum of its proper divisors (9598601).

28795791 is an equidigital number, since it uses as much as digits as its factorization.

28795791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9598600.

The product of its digits is 317520, while the sum is 48.

The square root of 28795791 is about 5366.1709812491. The cubic root of 28795791 is about 306.5088398392.

The spelling of 28795791 in words is "twenty-eight million, seven hundred ninety-five thousand, seven hundred ninety-one".