11801856 has 108 divisors (see below), whose sum is σ = 34797056. Its totient is φ = 3548160.

The previous prime is 11801827. The next prime is 11801861. The reversal of 11801856 is 65810811.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92865 + ... + 92991.

Almost surely, 2^11801856 is an apocalyptic number.

11801856 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 11801856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17398528).

11801856 is an abundant number, since it is smaller than the sum of its proper divisors (22995200).

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

11801856 is a wasteful number, since it uses less digits than its factorization.

11801856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 11801856 is about 3435.3829480860. The cubic root of 11801856 is about 227.6757471426.

The spelling of 11801856 in words is "eleven million, eight hundred one thousand, eight hundred fifty-six".