28211374091 has 2 divisors, whose sum is σ = 28211374092. Its totient is φ = 28211374090.

The previous prime is 28211374049. The next prime is 28211374111. The reversal of 28211374091 is 19047311282.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28211374091 - 2⁶ = 28211374027 is a prime.

It is not a weakly prime, because it can be changed into another prime (28211314091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14105687045 + 14105687046.

It is an arithmetic number, because the mean of its divisors is an integer number (14105687046).

Almost surely, 2^28211374091 is an apocalyptic number.

28211374091 is a deficient number, since it is larger than the sum of its proper divisors (1).

28211374091 is an equidigital number, since it uses as much as digits as its factorization.

28211374091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 28211374091 in words is "twenty-eight billion, two hundred eleven million, three hundred seventy-four thousand, ninety-one".