28889269 has 4 divisors (see below), whose sum is σ = 28905696. Its totient is φ = 28872844.

The previous prime is 28889233. The next prime is 28889281. The reversal of 28889269 is 96298882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28889269 - 2⁷ = 28889141 is a prime.

It is a super-2 number, since 2×28889269² = 1669179726708722, 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 (28889209) 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, 5209 + ... + 9214.

It is an arithmetic number, because the mean of its divisors is an integer number (7226424).

Almost surely, 2^28889269 is an apocalyptic number.

It is an amenable number.

28889269 is a deficient number, since it is larger than the sum of its proper divisors (16427).

28889269 is a wasteful number, since it uses less digits than its factorization.

28889269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16426.

The product of its digits is 995328, while the sum is 52.

The square root of 28889269 is about 5374.8738589850. The cubic root of 28889269 is about 306.8401485081.

The spelling of 28889269 in words is "twenty-eight million, eight hundred eighty-nine thousand, two hundred sixty-nine".