27828161 has 2 divisors, whose sum is σ = 27828162. Its totient is φ = 27828160.

The previous prime is 27828149. The next prime is 27828169. The reversal of 27828161 is 16182872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25563136 + 2265025 = 5056^2 + 1505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27828161 is a prime.

It is not a weakly prime, because it can be changed into another prime (27828169) 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, 13914080 + 13914081.

It is an arithmetic number, because the mean of its divisors is an integer number (13914081).

Almost surely, 2^27828161 is an apocalyptic number.

It is an amenable number.

27828161 is a deficient number, since it is larger than the sum of its proper divisors (1).

27828161 is an equidigital number, since it uses as much as digits as its factorization.

27828161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 35.

The square root of 27828161 is about 5275.2403736702. The cubic root of 27828161 is about 303.0364263265.

The spelling of 27828161 in words is "twenty-seven million, eight hundred twenty-eight thousand, one hundred sixty-one".