1128928668 has 48 divisors (see below), whose sum is σ = 3015876864. Its totient is φ = 321972480.

The previous prime is 1128928667. The next prime is 1128928679. The reversal of 1128928668 is 8668298211.

It is a self number, because there is not a number n which added to its sum of digits gives 1128928668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128928663) 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 15 ways as a sum of consecutive naturals, for example, 36196 + ... + 59732.

It is an arithmetic number, because the mean of its divisors is an integer number (62830768).

Almost surely, 2^1128928668 is an apocalyptic number.

It is an amenable number.

1128928668 is an abundant number, since it is smaller than the sum of its proper divisors (1886948196).

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

1128928668 is a wasteful number, since it uses less digits than its factorization.

1128928668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24122 (or 24120 counting only the distinct ones).

The product of its digits is 663552, while the sum is 51.

The square root of 1128928668 is about 33599.5337467650. The cubic root of 1128928668 is about 1041.2511655405.

The spelling of 1128928668 in words is "one billion, one hundred twenty-eight million, nine hundred twenty-eight thousand, six hundred sixty-eight".