1128203280 has 120 divisors (see below), whose sum is σ = 3988345920. Its totient is φ = 285016320.

The previous prime is 1128203267. The next prime is 1128203281. The reversal of 1128203280 is 823028211.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (1128203281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27556 + ... + 54915.

It is an arithmetic number, because the mean of its divisors is an integer number (33236216).

Almost surely, 2^1128203280 is an apocalyptic number.

1128203280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128203280 is an abundant number, since it is smaller than the sum of its proper divisors (2860142640).

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

1128203280 is a wasteful number, since it uses less digits than its factorization.

1128203280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82509 (or 82500 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1128203280 is about 33588.7373981220. The cubic root of 1128203280 is about 1041.0281006846.

The spelling of 1128203280 in words is "one billion, one hundred twenty-eight million, two hundred three thousand, two hundred eighty".