28075269 has 4 divisors (see below), whose sum is σ = 37433696. Its totient is φ = 18716844.

The previous prime is 28075253. The next prime is 28075291. The reversal of 28075269 is 96257082.

It is a happy number.

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 not a de Polignac number, because 28075269 - 2⁴ = 28075253 is a prime.

It is a super-2 number, since 2×28075269² = 1576441458844722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4679209 + ... + 4679214.

It is an arithmetic number, because the mean of its divisors is an integer number (9358424).

Almost surely, 2^28075269 is an apocalyptic number.

It is an amenable number.

28075269 is a deficient number, since it is larger than the sum of its proper divisors (9358427).

28075269 is an equidigital number, since it uses as much as digits as its factorization.

28075269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9358426.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 28075269 is about 5298.6101007717. The cubic root of 28075269 is about 303.9307501832.

The spelling of 28075269 in words is "twenty-eight million, seventy-five thousand, two hundred sixty-nine".