1028648911 has 8 divisors (see below), whose sum is σ = 1034426880. Its totient is φ = 1022882328.

The previous prime is 1028648867. The next prime is 1028648921. The reversal of 1028648911 is 1198468201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1028648911 - 2⁷ = 1028648783 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 (1028648921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 229090 + ... + 233536.

It is an arithmetic number, because the mean of its divisors is an integer number (129303360).

Almost surely, 2^1028648911 is an apocalyptic number.

1028648911 is a deficient number, since it is larger than the sum of its proper divisors (5777969).

1028648911 is a wasteful number, since it uses less digits than its factorization.

1028648911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5693.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1028648911 is about 32072.5569763310. The cubic root of 1028648911 is about 1009.4598657551.

The spelling of 1028648911 in words is "one billion, twenty-eight million, six hundred forty-eight thousand, nine hundred eleven".