11555128 has 32 divisors (see below), whose sum is σ = 23531760. Its totient is φ = 5287680.

The previous prime is 11555123. The next prime is 11555129. The reversal of 11555128 is 82155511.

It is a junction number, because it is equal to n+sod(n) for n = 11555096 and 11555105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13843 + ... + 14653.

Almost surely, 2^11555128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11555128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11765880).

11555128 is an abundant number, since it is smaller than the sum of its proper divisors (11976632).

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

11555128 is a wasteful number, since it uses less digits than its factorization.

11555128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 963 counting only the distinct ones).

The product of its digits is 2000, while the sum is 28.

The square root of 11555128 is about 3399.2834539061. The cubic root of 11555128 is about 226.0779745038.

The spelling of 11555128 in words is "eleven million, five hundred fifty-five thousand, one hundred twenty-eight".