1089817028 has 24 divisors (see below), whose sum is σ = 2084511744. Its totient is φ = 496310400.

The previous prime is 1089817021. The next prime is 1089817031. The reversal of 1089817028 is 8207189801.

It is a self number, because there is not a number n which added to its sum of digits gives 1089817028.

It is not an unprimeable number, because it can be changed into a prime (1089817021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256388 + ... + 260603.

It is an arithmetic number, because the mean of its divisors is an integer number (86854656).

Almost surely, 2^1089817028 is an apocalyptic number.

It is an amenable number.

1089817028 is a deficient number, since it is larger than the sum of its proper divisors (994694716).

1089817028 is a wasteful number, since it uses less digits than its factorization.

1089817028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517043 (or 517041 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 1089817028 is about 33012.3768910995. The cubic root of 1089817028 is about 1029.0848779498.

The spelling of 1089817028 in words is "one billion, eighty-nine million, eight hundred seventeen thousand, twenty-eight".