28489199 has 4 divisors (see below), whose sum is σ = 28879536. Its totient is φ = 28098864.

The previous prime is 28489147. The next prime is 28489207. The reversal of 28489199 is 99198482.

It is a happy number.

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 28489199 - 2¹² = 28485103 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 (28489129) 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, 195059 + ... + 195204.

It is an arithmetic number, because the mean of its divisors is an integer number (7219884).

Almost surely, 2^28489199 is an apocalyptic number.

28489199 is a deficient number, since it is larger than the sum of its proper divisors (390337).

28489199 is an equidigital number, since it uses as much as digits as its factorization.

28489199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390336.

The product of its digits is 373248, while the sum is 50.

The square root of 28489199 is about 5337.5274238171. The cubic root of 28489199 is about 305.4171448836.

The spelling of 28489199 in words is "twenty-eight million, four hundred eighty-nine thousand, one hundred ninety-nine".