28797393 has 4 divisors (see below), whose sum is σ = 38396528. Its totient is φ = 19198260.

The previous prime is 28797367. The next prime is 28797409. The reversal of 28797393 is 39379782.

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 28797393 - 2⁹ = 28796881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28797343) 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, 4799563 + ... + 4799568.

It is an arithmetic number, because the mean of its divisors is an integer number (9599132).

Almost surely, 2^28797393 is an apocalyptic number.

It is an amenable number.

28797393 is a deficient number, since it is larger than the sum of its proper divisors (9599135).

28797393 is an equidigital number, since it uses as much as digits as its factorization.

28797393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9599134.

The product of its digits is 571536, while the sum is 48.

The square root of 28797393 is about 5366.3202476185. The cubic root of 28797393 is about 306.5145237492.

The spelling of 28797393 in words is "twenty-eight million, seven hundred ninety-seven thousand, three hundred ninety-three".