28229161 has 2 divisors, whose sum is σ = 28229162. Its totient is φ = 28229160.

The previous prime is 28229141. The next prime is 28229171. The reversal of 28229161 is 16192282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24561936 + 3667225 = 4956^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 28229161 - 2¹¹ = 28227113 is a prime.

It is not a weakly prime, because it can be changed into another prime (28229111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114580 + 14114581.

It is an arithmetic number, because the mean of its divisors is an integer number (14114581).

Almost surely, 2^28229161 is an apocalyptic number.

It is an amenable number.

28229161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28229161 is an equidigital number, since it uses as much as digits as its factorization.

28229161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 28229161 is about 5313.1121764932. The cubic root of 28229161 is about 304.4850614120.

The spelling of 28229161 in words is "twenty-eight million, two hundred twenty-nine thousand, one hundred sixty-one".