28323049 has 4 divisors (see below), whose sum is σ = 28398160. Its totient is φ = 28247940.

The previous prime is 28323047. The next prime is 28323067. The reversal of 28323049 is 94032382.

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 28323049 - 2¹ = 28323047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28323049.

It is not an unprimeable number, because it can be changed into a prime (28323047) 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, 36987 + ... + 37744.

It is an arithmetic number, because the mean of its divisors is an integer number (7099540).

Almost surely, 2^28323049 is an apocalyptic number.

It is an amenable number.

28323049 is a deficient number, since it is larger than the sum of its proper divisors (75111).

28323049 is an equidigital number, since it uses as much as digits as its factorization.

28323049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75110.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28323049 is about 5321.9403416423. The cubic root of 28323049 is about 304.8222524301.

It can be divided in two parts, 283 and 23049, that added together give a palindrome (23332).

The spelling of 28323049 in words is "twenty-eight million, three hundred twenty-three thousand, forty-nine".