28193739111 has 6 divisors (see below), whose sum is σ = 40724289840. Its totient is φ = 18795826068.

The previous prime is 28193739061. The next prime is 28193739121. The reversal of 28193739111 is 11193739182.

It is a happy number.

It is not a de Polignac number, because 28193739111 - 2⁶ = 28193739047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28193739121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1566318831 + ... + 1566318848.

It is an arithmetic number, because the mean of its divisors is an integer number (6787381640).

Almost surely, 2^28193739111 is an apocalyptic number.

28193739111 is a deficient number, since it is larger than the sum of its proper divisors (12530550729).

28193739111 is a wasteful number, since it uses less digits than its factorization.

28193739111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3132637685 (or 3132637682 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The spelling of 28193739111 in words is "twenty-eight billion, one hundred ninety-three million, seven hundred thirty-nine thousand, one hundred eleven".