28447099 has 4 divisors (see below), whose sum is σ = 28458880. Its totient is φ = 28435320.

The previous prime is 28447063. The next prime is 28447157. The reversal of 28447099 is 99074482.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28447099 - 2¹⁷ = 28316027 is a prime.

It is a super-3 number, since 3×28447099³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28447039) 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, 804 + ... + 7585.

It is an arithmetic number, because the mean of its divisors is an integer number (7114720).

Almost surely, 2^28447099 is an apocalyptic number.

28447099 is a deficient number, since it is larger than the sum of its proper divisors (11781).

28447099 is an equidigital number, since it uses as much as digits as its factorization.

28447099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11780.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 28447099 is about 5333.5821921107. The cubic root of 28447099 is about 305.2666270133.

The spelling of 28447099 in words is "twenty-eight million, four hundred forty-seven thousand, ninety-nine".