28473199 has 4 divisors (see below), whose sum is σ = 28483936. Its totient is φ = 28462464.

The previous prime is 28473187. The next prime is 28473209. The reversal of 28473199 is 99137482.

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, and also an emirpimes, since its reverse is a distinct semiprime: 99137482 = 2 ⋅49568741.

It is a cyclic number.

It is not a de Polignac number, because 28473199 - 2⁵ = 28473167 is a prime.

It is a super-2 number, since 2×28473199² = 1621446122587202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28473499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807 + ... + 7759.

It is an arithmetic number, because the mean of its divisors is an integer number (7120984).

Almost surely, 2^28473199 is an apocalyptic number.

28473199 is a deficient number, since it is larger than the sum of its proper divisors (10737).

28473199 is an equidigital number, since it uses as much as digits as its factorization.

28473199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10736.

The product of its digits is 108864, while the sum is 43.

The square root of 28473199 is about 5336.0283919784. The cubic root of 28473199 is about 305.3599584225.

The spelling of 28473199 in words is "twenty-eight million, four hundred seventy-three thousand, one hundred ninety-nine".