11191128 has 32 divisors (see below), whose sum is σ = 30130800. Its totient is φ = 3443328.

The previous prime is 11191099. The next prime is 11191153. The reversal of 11191128 is 82119111.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 11191098 and 11191107.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17623 + ... + 18246.

Almost surely, 2^11191128 is an apocalyptic number.

It is an amenable number.

11191128 is an abundant number, since it is smaller than the sum of its proper divisors (18939672).

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

11191128 is a wasteful number, since it uses less digits than its factorization.

11191128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35891 (or 35887 counting only the distinct ones).

The product of its digits is 144, while the sum is 24.

The square root of 11191128 is about 3345.3143350065. The cubic root of 11191128 is about 223.6786953798.

The spelling of 11191128 in words is "eleven million, one hundred ninety-one thousand, one hundred twenty-eight".