1128216732 has 48 divisors (see below), whose sum is σ = 2787173760. Its totient is φ = 354207168.

The previous prime is 1128216707. The next prime is 1128216743. The reversal of 1128216732 is 2376128211.

It is a junction number, because it is equal to n+sod(n) for n = 1128216693 and 1128216702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25143 + ... + 53745.

It is an arithmetic number, because the mean of its divisors is an integer number (58066120).

Almost surely, 2^1128216732 is an apocalyptic number.

1128216732 is a gapful number since it is divisible by the number (12) 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 1128216732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393586880).

1128216732 is an abundant number, since it is smaller than the sum of its proper divisors (1658957028).

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

1128216732 is a wasteful number, since it uses less digits than its factorization.

1128216732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28802 (or 28800 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 1128216732 is about 33588.9376432182. The cubic root of 1128216732 is about 1041.0322381938.

The spelling of 1128216732 in words is "one billion, one hundred twenty-eight million, two hundred sixteen thousand, seven hundred thirty-two".