28698199 has 4 divisors (see below), whose sum is σ = 29473864. Its totient is φ = 27922536.

The previous prime is 28698191. The next prime is 28698209. The reversal of 28698199 is 99189682.

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

It is a cyclic number.

It is not a de Polignac number, because 28698199 - 2³ = 28698191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28698191) 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, 387777 + ... + 387850.

It is an arithmetic number, because the mean of its divisors is an integer number (7368466).

Almost surely, 2^28698199 is an apocalyptic number.

28698199 is a deficient number, since it is larger than the sum of its proper divisors (775665).

28698199 is an equidigital number, since it uses as much as digits as its factorization.

28698199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775664.

The product of its digits is 559872, while the sum is 52.

The square root of 28698199 is about 5357.0700014094. The cubic root of 28698199 is about 306.1621842344.

The spelling of 28698199 in words is "twenty-eight million, six hundred ninety-eight thousand, one hundred ninety-nine".