28323793 has 4 divisors (see below), whose sum is σ = 28405300. Its totient is φ = 28242288.

The previous prime is 28323767. The next prime is 28323797. The reversal of 28323793 is 39732382.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15421329 + 12902464 = 3927^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 28323793 - 2⁵ = 28323761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28323797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40230 + ... + 40927.

It is an arithmetic number, because the mean of its divisors is an integer number (7101325).

Almost surely, 2^28323793 is an apocalyptic number.

It is an amenable number.

28323793 is a deficient number, since it is larger than the sum of its proper divisors (81507).

28323793 is an equidigital number, since it uses as much as digits as its factorization.

28323793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81506.

The product of its digits is 54432, while the sum is 37.

The square root of 28323793 is about 5322.0102405012. The cubic root of 28323793 is about 304.8249214668.

It can be divided in two parts, 2832379 and 3, that added together give a palindrome (2832382).

The spelling of 28323793 in words is "twenty-eight million, three hundred twenty-three thousand, seven hundred ninety-three".