28231803111 has 4 divisors (see below), whose sum is σ = 37642404152. Its totient is φ = 18821202072.

The previous prime is 28231803109. The next prime is 28231803133. The reversal of 28231803111 is 11130813282.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28231803111 - 2¹ = 28231803109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28231803211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705300516 + ... + 4705300521.

It is an arithmetic number, because the mean of its divisors is an integer number (9410601038).

Almost surely, 2^28231803111 is an apocalyptic number.

28231803111 is a deficient number, since it is larger than the sum of its proper divisors (9410601041).

28231803111 is an equidigital number, since it uses as much as digits as its factorization.

28231803111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9410601040.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 28231803111 in words is "twenty-eight billion, two hundred thirty-one million, eight hundred three thousand, one hundred eleven".