28795997 has 4 divisors (see below), whose sum is σ = 29225856. Its totient is φ = 28366140.

The previous prime is 28795969. The next prime is 28795999. The reversal of 28795997 is 79959782.

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 a cyclic number.

It is not a de Polignac number, because 28795997 - 2¹⁴ = 28779613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28795999) 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, 214829 + ... + 214962.

It is an arithmetic number, because the mean of its divisors is an integer number (7306464).

Almost surely, 2^28795997 is an apocalyptic number.

It is an amenable number.

28795997 is a deficient number, since it is larger than the sum of its proper divisors (429859).

28795997 is an equidigital number, since it uses as much as digits as its factorization.

28795997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429858.

The product of its digits is 2857680, while the sum is 56.

The square root of 28795997 is about 5366.1901755342. The cubic root of 28795997 is about 306.5095707408.

It can be divided in two parts, 28795 and 997, that added together give a palindrome (29792).

The spelling of 28795997 in words is "twenty-eight million, seven hundred ninety-five thousand, nine hundred ninety-seven".