1128981888 has 256 divisors, whose sum is σ = 3496152000. Its totient is φ = 362797056.

The previous prime is 1128981859. The next prime is 1128981929. The reversal of 1128981888 is 8881898211.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10357578 + ... + 10357686.

Almost surely, 2^1128981888 is an apocalyptic number.

1128981888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128981888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748076000).

1128981888 is an abundant number, since it is smaller than the sum of its proper divisors (2367170112).

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

1128981888 is an frugal number, since it uses more digits than its factorization.

1128981888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 151 counting only the distinct ones).

The product of its digits is 589824, while the sum is 54.

The square root of 1128981888 is about 33600.3257127070. The cubic root of 1128981888 is about 1041.2675275180.

The spelling of 1128981888 in words is "one billion, one hundred twenty-eight million, nine hundred eighty-one thousand, eight hundred eighty-eight".