28398793 has 4 divisors (see below), whose sum is σ = 28798848. Its totient is φ = 27998740.

The previous prime is 28398781. The next prime is 28398809. The reversal of 28398793 is 39789382.

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 28398793 - 2⁵ = 28398761 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28398193) 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, 199921 + ... + 200062.

It is an arithmetic number, because the mean of its divisors is an integer number (7199712).

Almost surely, 2^28398793 is an apocalyptic number.

It is an amenable number.

28398793 is a deficient number, since it is larger than the sum of its proper divisors (400055).

28398793 is an equidigital number, since it uses as much as digits as its factorization.

28398793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400054.

The product of its digits is 653184, while the sum is 49.

The square root of 28398793 is about 5329.0517918294. The cubic root of 28398793 is about 305.0937380963.

The spelling of 28398793 in words is "twenty-eight million, three hundred ninety-eight thousand, seven hundred ninety-three".