28797995 has 4 divisors (see below), whose sum is σ = 34557600. Its totient is φ = 23038392.

The previous prime is 28797991. The next prime is 28798009. The reversal of 28797995 is 59979782.

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 28797995 - 2² = 28797991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28797995.

It is not an unprimeable number, because it can be changed into a prime (28797991) 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, 2879795 + ... + 2879804.

It is an arithmetic number, because the mean of its divisors is an integer number (8639400).

Almost surely, 2^28797995 is an apocalyptic number.

28797995 is a deficient number, since it is larger than the sum of its proper divisors (5759605).

28797995 is an equidigital number, since it uses as much as digits as its factorization.

28797995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759604.

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

The square root of 28797995 is about 5366.3763379025. The cubic root of 28797995 is about 306.5166595960.

It can be divided in two parts, 28797 and 995, that added together give a palindrome (29792).

The spelling of 28797995 in words is "twenty-eight million, seven hundred ninety-seven thousand, nine hundred ninety-five".