1099191128 has 24 divisors (see below), whose sum is σ = 2397471300. Its totient is φ = 471081744.

The previous prime is 1099191127. The next prime is 1099191131. The reversal of 1099191128 is 8211919901.

It is a super-2 number, since 2×1099191128² = 2416442271747824768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099191127) 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 5 ways as a sum of consecutive naturals, for example, 1401638 + ... + 1402421.

Almost surely, 2^1099191128 is an apocalyptic number.

It is an amenable number.

1099191128 is an abundant number, since it is smaller than the sum of its proper divisors (1298280172).

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

1099191128 is a wasteful number, since it uses less digits than its factorization.

1099191128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804079 (or 2804068 counting only the distinct ones).

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

The square root of 1099191128 is about 33154.0514567979. The cubic root of 1099191128 is about 1032.0270284170.

The spelling of 1099191128 in words is "one billion, ninety-nine million, one hundred ninety-one thousand, one hundred twenty-eight".