28566469 has 4 divisors (see below), whose sum is σ = 29488000. Its totient is φ = 27644940.

The previous prime is 28566457. The next prime is 28566487. The reversal of 28566469 is 96466582.

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 28566469 - 2¹¹ = 28564421 is a prime.

It is a super-2 number, since 2×28566469² = 1632086302255922, 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 (28566449) 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, 460719 + ... + 460780.

It is an arithmetic number, because the mean of its divisors is an integer number (7372000).

Almost surely, 2^28566469 is an apocalyptic number.

It is an amenable number.

28566469 is a deficient number, since it is larger than the sum of its proper divisors (921531).

28566469 is an equidigital number, since it uses as much as digits as its factorization.

28566469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921530.

The product of its digits is 622080, while the sum is 46.

The square root of 28566469 is about 5344.7608926873. The cubic root of 28566469 is about 305.6930187781.

The spelling of 28566469 in words is "twenty-eight million, five hundred sixty-six thousand, four hundred sixty-nine".