28809370111 has 2 divisors, whose sum is σ = 28809370112. Its totient is φ = 28809370110.

The previous prime is 28809370099. The next prime is 28809370129. The reversal of 28809370111 is 11107390882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28809370111 - 2³³ = 20219435519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28809380111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14404685055 + 14404685056.

It is an arithmetic number, because the mean of its divisors is an integer number (14404685056).

Almost surely, 2^28809370111 is an apocalyptic number.

28809370111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28809370111 is an equidigital number, since it uses as much as digits as its factorization.

28809370111 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 40.

The spelling of 28809370111 in words is "twenty-eight billion, eight hundred nine million, three hundred seventy thousand, one hundred eleven".