1128746988 has 120 divisors (see below), whose sum is σ = 3100914432. Its totient is φ = 357340896.

The previous prime is 1128746981. The next prime is 1128747007. The reversal of 1128746988 is 8896478211.

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

It is not an unprimeable number, because it can be changed into a prime (1128746981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1244031 + ... + 1244937.

Almost surely, 2^1128746988 is an apocalyptic number.

1128746988 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 1128746988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550457216).

1128746988 is an abundant number, since it is smaller than the sum of its proper divisors (1972167444).

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

1128746988 is a wasteful number, since it uses less digits than its factorization.

1128746988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1102 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 1128746988 is about 33596.8300290370. The cubic root of 1128746988 is about 1041.1953058965.

The spelling of 1128746988 in words is "one billion, one hundred twenty-eight million, seven hundred forty-six thousand, nine hundred eighty-eight".