11001856 has 56 divisors (see below), whose sum is σ = 23591520. Its totient is φ = 5111808.

The previous prime is 11001853. The next prime is 11001911. The reversal of 11001856 is 65810011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139225 + ... + 139303.

Almost surely, 2^11001856 is an apocalyptic number.

11001856 is a gapful number since it is divisible by the number (16) 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 11001856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11795760).

11001856 is an abundant number, since it is smaller than the sum of its proper divisors (12589664).

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

11001856 is an frugal number, since it uses more digits than its factorization.

11001856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 11001856 is about 3316.9045810816. The cubic root of 11001856 is about 222.4105165567.

Adding to 11001856 its reverse (65810011), we get a palindrome (76811867).

The spelling of 11001856 in words is "eleven million, one thousand, eight hundred fifty-six".