28634161 has 2 divisors, whose sum is σ = 28634162. Its totient is φ = 28634160.

The previous prime is 28634143. The next prime is 28634167. The reversal of 28634161 is 16143682.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27720225 + 913936 = 5265^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 28634161 - 2⁵ = 28634129 is a prime.

It is not a weakly prime, because it can be changed into another prime (28634167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14317080 + 14317081.

It is an arithmetic number, because the mean of its divisors is an integer number (14317081).

Almost surely, 2^28634161 is an apocalyptic number.

It is an amenable number.

28634161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28634161 is an equidigital number, since it uses as much as digits as its factorization.

28634161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 28634161 is about 5351.0897021074. The cubic root of 28634161 is about 305.9342882236.

The spelling of 28634161 in words is "twenty-eight million, six hundred thirty-four thousand, one hundred sixty-one".