28324299 has 4 divisors (see below), whose sum is σ = 37765736. Its totient is φ = 18882864.

The previous prime is 28324273. The next prime is 28324321. The reversal of 28324299 is 99242382.

It is a happy number.

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

It is not a de Polignac number, because 28324299 - 2⁷ = 28324171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28324259) 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, 4720714 + ... + 4720719.

It is an arithmetic number, because the mean of its divisors is an integer number (9441434).

Almost surely, 2^28324299 is an apocalyptic number.

28324299 is a deficient number, since it is larger than the sum of its proper divisors (9441437).

28324299 is an equidigital number, since it uses as much as digits as its factorization.

28324299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9441436.

The product of its digits is 62208, while the sum is 39.

The square root of 28324299 is about 5322.0577787168. The cubic root of 28324299 is about 304.8267366720.

The spelling of 28324299 in words is "twenty-eight million, three hundred twenty-four thousand, two hundred ninety-nine".