28862161 has 2 divisors, whose sum is σ = 28862162. Its totient is φ = 28862160.

The previous prime is 28862149. The next prime is 28862167. The reversal of 28862161 is 16126882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24196561 + 4665600 = 4919^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 28862161 - 2⁵ = 28862129 is a prime.

It is not a weakly prime, because it can be changed into another prime (28862167) 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, 14431080 + 14431081.

It is an arithmetic number, because the mean of its divisors is an integer number (14431081).

Almost surely, 2^28862161 is an apocalyptic number.

It is an amenable number.

28862161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28862161 is an equidigital number, since it uses as much as digits as its factorization.

28862161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 28862161 is about 5372.3515335466. The cubic root of 28862161 is about 306.7441448588.

The spelling of 28862161 in words is "twenty-eight million, eight hundred sixty-two thousand, one hundred sixty-one".