1028275111 has 4 divisors (see below), whose sum is σ = 1034824792. Its totient is φ = 1021725432.

The previous prime is 1028275097. The next prime is 1028275181. The reversal of 1028275111 is 1115728201.

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

It is a cyclic number.

It is not a de Polignac number, because 1028275111 - 2⁷ = 1028274983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028275111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028275181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3274605 + ... + 3274918.

It is an arithmetic number, because the mean of its divisors is an integer number (258706198).

Almost surely, 2^1028275111 is an apocalyptic number.

1028275111 is a deficient number, since it is larger than the sum of its proper divisors (6549681).

1028275111 is an equidigital number, since it uses as much as digits as its factorization.

1028275111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6549680.

The product of its (nonzero) digits is 1120, while the sum is 28.

The square root of 1028275111 is about 32066.7290349359. The cubic root of 1028275111 is about 1009.3375753054.

The spelling of 1028275111 in words is "one billion, twenty-eight million, two hundred seventy-five thousand, one hundred eleven".