28069569 has 48 divisors (see below), whose sum is σ = 46475520. Its totient is φ = 16174080.

The previous prime is 28069553. The next prime is 28069579. The reversal of 28069569 is 96596082.

28069569 is a `hidden beast` number, since 2 + 80 + 6 + 9 + 569 = 666.

It is not a de Polignac number, because 28069569 - 2⁴ = 28069553 is a prime.

It is a super-2 number, since 2×28069569² = 1575801407691522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28069529) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289329 + ... + 289425.

It is an arithmetic number, because the mean of its divisors is an integer number (968240).

Almost surely, 2^28069569 is an apocalyptic number.

It is an amenable number.

28069569 is a deficient number, since it is larger than the sum of its proper divisors (18405951).

28069569 is a wasteful number, since it uses less digits than its factorization.

28069569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 28069569 is about 5298.0721965636. The cubic root of 28069569 is about 303.9101802108.

The spelling of 28069569 in words is "twenty-eight million, sixty-nine thousand, five hundred sixty-nine".