28569833 has 4 divisors (see below), whose sum is σ = 28713600. Its totient is φ = 28426068.

The previous prime is 28569829. The next prime is 28569839. The reversal of 28569833 is 33896582.

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 28569833 - 2² = 28569829 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28569839) 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, 71585 + ... + 71982.

It is an arithmetic number, because the mean of its divisors is an integer number (7178400).

Almost surely, 2^28569833 is an apocalyptic number.

It is an amenable number.

28569833 is a deficient number, since it is larger than the sum of its proper divisors (143767).

28569833 is a wasteful number, since it uses less digits than its factorization.

28569833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143766.

The product of its digits is 311040, while the sum is 44.

The square root of 28569833 is about 5345.0755841241. The cubic root of 28569833 is about 305.7050178221.

The spelling of 28569833 in words is "twenty-eight million, five hundred sixty-nine thousand, eight hundred thirty-three".