28823569 has 2 divisors, whose sum is σ = 28823570. Its totient is φ = 28823568.

The previous prime is 28823563. The next prime is 28823591. The reversal of 28823569 is 96532882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25806400 + 3017169 = 5080^2 + 1737^2 .

It is a cyclic number.

It is not a de Polignac number, because 28823569 - 2⁷ = 28823441 is a prime.

It is a super-2 number, since 2×28823569² = 1661596259795522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28823563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411784 + 14411785.

It is an arithmetic number, because the mean of its divisors is an integer number (14411785).

Almost surely, 2^28823569 is an apocalyptic number.

It is an amenable number.

28823569 is a deficient number, since it is larger than the sum of its proper divisors (1).

28823569 is an equidigital number, since it uses as much as digits as its factorization.

28823569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 28823569 is about 5368.7586088406. The cubic root of 28823569 is about 306.6073665795.

It can be divided in two parts, 28823 and 569, that added together give a palindrome (29392).

The spelling of 28823569 in words is "twenty-eight million, eight hundred twenty-three thousand, five hundred sixty-nine".