1028181111 has 16 divisors (see below), whose sum is σ = 1387116768. Its totient is φ = 677376000.

The previous prime is 1028181043. The next prime is 1028181113. The reversal of 1028181111 is 1111818201.

It is not a de Polignac number, because 1028181111 - 2¹³ = 1028172919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028181113) 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 15 ways as a sum of consecutive naturals, for example, 171891 + ... + 177771.

It is an arithmetic number, because the mean of its divisors is an integer number (86694798).

Almost surely, 2^1028181111 is an apocalyptic number.

1028181111 is a deficient number, since it is larger than the sum of its proper divisors (358935657).

1028181111 is a wasteful number, since it uses less digits than its factorization.

1028181111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6562.

The product of its (nonzero) digits is 128, while the sum is 24.

The square root of 1028181111 is about 32065.2633078227. The cubic root of 1028181111 is about 1009.3068180945.

Adding to 1028181111 its reverse (1111818201), we get a palindrome (2139999312).

The spelling of 1028181111 in words is "one billion, twenty-eight million, one hundred eighty-one thousand, one hundred eleven".