1128228516 has 18 divisors (see below), whose sum is σ = 2851911062. Its totient is φ = 376076160.

The previous prime is 1128228487. The next prime is 1128228523. The reversal of 1128228516 is 6158228211.

1128228516 is a `hidden beast` number, since 112 + 8 + 2 + 28 + 516 = 666.

1128228516 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1122920100 + 5308416 = 33510^2 + 2304^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 31339681 = 1128228516 / (1 + 1 + 2 + 8 + 2 + 2 + 8 + 5 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15669805 + ... + 15669876.

Almost surely, 2^1128228516 is an apocalyptic number.

It is an amenable number.

1128228516 is an abundant number, since it is smaller than the sum of its proper divisors (1723682546).

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

1128228516 is a wasteful number, since it uses less digits than its factorization.

1128228516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31339691 (or 31339686 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 1128228516 is about 33589.1130576560. The cubic root of 1128228516 is about 1041.0358626396.

The spelling of 1128228516 in words is "one billion, one hundred twenty-eight million, two hundred twenty-eight thousand, five hundred sixteen".