28119811 has 2 divisors, whose sum is σ = 28119812. Its totient is φ = 28119810.

The previous prime is 28119787. The next prime is 28119827. The reversal of 28119811 is 11891182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28119811 is a prime.

It is not a weakly prime, because it can be changed into another prime (28119851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14059905 + 14059906.

It is an arithmetic number, because the mean of its divisors is an integer number (14059906).

Almost surely, 2^28119811 is an apocalyptic number.

28119811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28119811 is an equidigital number, since it uses as much as digits as its factorization.

28119811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 31.

The square root of 28119811 is about 5302.8116127202. The cubic root of 28119811 is about 304.0913960825.

The spelling of 28119811 in words is "twenty-eight million, one hundred nineteen thousand, eight hundred eleven".