28969223 has 2 divisors, whose sum is σ = 28969224. Its totient is φ = 28969222.

The previous prime is 28969189. The next prime is 28969267. The reversal of 28969223 is 32296982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28969223 - 2¹⁴ = 28952839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28969273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14484611 + 14484612.

It is an arithmetic number, because the mean of its divisors is an integer number (14484612).

Almost surely, 2^28969223 is an apocalyptic number.

28969223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28969223 is an equidigital number, since it uses as much as digits as its factorization.

28969223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 28969223 is about 5382.3064758522. The cubic root of 28969223 is about 307.1229582411.

It can be divided in two parts, 28969 and 223, that added together give a palindrome (29192).

The spelling of 28969223 in words is "twenty-eight million, nine hundred sixty-nine thousand, two hundred twenty-three".