28160569 has 4 divisors (see below), whose sum is σ = 28580944. Its totient is φ = 27740196.

The previous prime is 28160521. The next prime is 28160611. The reversal of 28160569 is 96506182.

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 28160569 - 2²¹ = 26063417 is a prime.

It is a super-2 number, since 2×28160569² = 1586035292807522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28160519) 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, 210087 + ... + 210220.

It is an arithmetic number, because the mean of its divisors is an integer number (7145236).

Almost surely, 2^28160569 is an apocalyptic number.

It is an amenable number.

28160569 is a deficient number, since it is larger than the sum of its proper divisors (420375).

28160569 is an equidigital number, since it uses as much as digits as its factorization.

28160569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420374.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28160569 is about 5306.6532767838. The cubic root of 28160569 is about 304.2382459759.

The spelling of 28160569 in words is "twenty-eight million, one hundred sixty thousand, five hundred sixty-nine".