11555000 has 40 divisors (see below), whose sum is σ = 27085080. Its totient is φ = 4620000.

The previous prime is 11554999. The next prime is 11555009. The reversal of 11555000 is 55511.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11555000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3845 + ... + 6155.

It is an arithmetic number, because the mean of its divisors is an integer number (677127).

Almost surely, 2^11555000 is an apocalyptic number.

11555000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13542540).

11555000 is an abundant number, since it is smaller than the sum of its proper divisors (15530080).

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

11555000 is an equidigital number, since it uses as much as digits as its factorization.

11555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337 (or 2318 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 17.

The square root of 11555000 is about 3399.2646263567. The cubic root of 11555000 is about 226.0771397204.

The spelling of 11555000 in words is "eleven million, five hundred fifty-five thousand".