1028876889 has 8 divisors (see below), whose sum is σ = 1376789440. Its totient is φ = 683441136.

The previous prime is 1028876851. The next prime is 1028876897. The reversal of 1028876889 is 9886788201.

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

It is not a de Polignac number, because 1028876889 - 2⁹ = 1028876377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028876899) 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 7 ways as a sum of consecutive naturals, for example, 618229 + ... + 619890.

It is an arithmetic number, because the mean of its divisors is an integer number (172098680).

Almost surely, 2^1028876889 is an apocalyptic number.

It is an amenable number.

1028876889 is a deficient number, since it is larger than the sum of its proper divisors (347912551).

1028876889 is a wasteful number, since it uses less digits than its factorization.

1028876889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238399.

The product of its (nonzero) digits is 3096576, while the sum is 57.

The square root of 1028876889 is about 32076.1108770998. The cubic root of 1028876889 is about 1009.5344352995.

The spelling of 1028876889 in words is "one billion, twenty-eight million, eight hundred seventy-six thousand, eight hundred eighty-nine".