1128091008 has 128 divisors (see below), whose sum is σ = 3331238400. Its totient is φ = 335329280.

The previous prime is 1128090991. The next prime is 1128091021. The reversal of 1128091008 is 8001908211.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 221353 + ... + 226391.

It is an arithmetic number, because the mean of its divisors is an integer number (26025300).

Almost surely, 2^1128091008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128091008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665619200).

1128091008 is an abundant number, since it is smaller than the sum of its proper divisors (2203147392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128091008 is a wasteful number, since it uses less digits than its factorization.

1128091008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5120 (or 5108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 1128091008 is about 33587.0660820501. The cubic root of 1128091008 is about 1040.9935672554.

Adding to 1128091008 its reverse (8001908211), we get a palindrome (9129999219).

The spelling of 1128091008 in words is "one billion, one hundred twenty-eight million, ninety-one thousand, eight".