28179169 has 2 divisors, whose sum is σ = 28179170. Its totient is φ = 28179168.

The previous prime is 28179161. The next prime is 28179181. The reversal of 28179169 is 96197182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27962944 + 216225 = 5288^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 28179169 - 2³ = 28179161 is a prime.

It is a super-2 number, since 2×28179169² = 1588131131061122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28179161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14089584 + 14089585.

It is an arithmetic number, because the mean of its divisors is an integer number (14089585).

Almost surely, 2^28179169 is an apocalyptic number.

It is an amenable number.

28179169 is a deficient number, since it is larger than the sum of its proper divisors (1).

28179169 is an equidigital number, since it uses as much as digits as its factorization.

28179169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 28179169 is about 5308.4055044806. The cubic root of 28179169 is about 304.3052141533.

The spelling of 28179169 in words is "twenty-eight million, one hundred seventy-nine thousand, one hundred sixty-nine".