28289335 has 4 divisors (see below), whose sum is σ = 33947208. Its totient is φ = 22631464.

The previous prime is 28289323. The next prime is 28289357. The reversal of 28289335 is 53398282.

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 28289335 - 2⁹ = 28288823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2828929 + ... + 2828938.

It is an arithmetic number, because the mean of its divisors is an integer number (8486802).

Almost surely, 2^28289335 is an apocalyptic number.

28289335 is a deficient number, since it is larger than the sum of its proper divisors (5657873).

28289335 is an equidigital number, since it uses as much as digits as its factorization.

28289335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5657872.

The product of its digits is 103680, while the sum is 40.

The square root of 28289335 is about 5318.7719447256. The cubic root of 28289335 is about 304.7012572443.

The spelling of 28289335 in words is "twenty-eight million, two hundred eighty-nine thousand, three hundred thirty-five".