1109199128 has 16 divisors (see below), whose sum is σ = 2094931080. Its totient is φ = 550550848.

The previous prime is 1109199121. The next prime is 1109199131. The reversal of 1109199128 is 8219919011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1109199121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504926 + ... + 507117.

Almost surely, 2^1109199128 is an apocalyptic number.

It is an amenable number.

1109199128 is a deficient number, since it is larger than the sum of its proper divisors (985731952).

1109199128 is a wasteful number, since it uses less digits than its factorization.

1109199128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012186 (or 1012182 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 41.

The square root of 1109199128 is about 33304.6412381218. The cubic root of 1109199128 is about 1035.1497299464.

The spelling of 1109199128 in words is "one billion, one hundred nine million, one hundred ninety-nine thousand, one hundred twenty-eight".