11128855 has 4 divisors (see below), whose sum is σ = 13354632. Its totient is φ = 8903080.

The previous prime is 11128853. The next prime is 11128861. The reversal of 11128855 is 55882111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11128855 - 2¹ = 11128853 is a prime.

It is a super-2 number, since 2×11128855² = 247702827222050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11128853) 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 3 ways as a sum of consecutive naturals, for example, 1112881 + ... + 1112890.

It is an arithmetic number, because the mean of its divisors is an integer number (3338658).

Almost surely, 2^11128855 is an apocalyptic number.

11128855 is a deficient number, since it is larger than the sum of its proper divisors (2225777).

11128855 is an equidigital number, since it uses as much as digits as its factorization.

11128855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225776.

The product of its digits is 3200, while the sum is 31.

The square root of 11128855 is about 3335.9938549104. The cubic root of 11128855 is about 223.2630369585.

The spelling of 11128855 in words is "eleven million, one hundred twenty-eight thousand, eight hundred fifty-five".