1128428988 has 12 divisors (see below), whose sum is σ = 2633001000. Its totient is φ = 376142992.

The previous prime is 1128428971. The next prime is 1128428999. The reversal of 1128428988 is 8898248211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1128428988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47017863 + ... + 47017886.

It is an arithmetic number, because the mean of its divisors is an integer number (219416750).

Almost surely, 2^1128428988 is an apocalyptic number.

It is an amenable number.

1128428988 is an abundant number, since it is smaller than the sum of its proper divisors (1504572012).

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

1128428988 is a wasteful number, since it uses less digits than its factorization.

1128428988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94035756 (or 94035754 counting only the distinct ones).

The product of its digits is 589824, while the sum is 51.

The square root of 1128428988 is about 33592.0971063136. The cubic root of 1128428988 is about 1041.0975186424.

The spelling of 1128428988 in words is "one billion, one hundred twenty-eight million, four hundred twenty-eight thousand, nine hundred eighty-eight".