28434169 has 2 divisors, whose sum is σ = 28434170. Its totient is φ = 28434168.

The previous prime is 28434143. The next prime is 28434179. The reversal of 28434169 is 96143482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 131769 = 5320^2 + 363^2 .

It is a cyclic number.

It is not a de Polignac number, because 28434169 - 2⁷ = 28434041 is a prime.

It is a super-2 number, since 2×28434169² = 1617003933441122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28434139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14217084 + 14217085.

It is an arithmetic number, because the mean of its divisors is an integer number (14217085).

Almost surely, 2^28434169 is an apocalyptic number.

It is an amenable number.

28434169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28434169 is an equidigital number, since it uses as much as digits as its factorization.

28434169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 28434169 is about 5332.3699234018. The cubic root of 28434169 is about 305.2203692717.

It can be divided in two parts, 284 and 34169, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 28434169 in words is "twenty-eight million, four hundred thirty-four thousand, one hundred sixty-nine".