11851856 has 20 divisors (see below), whose sum is σ = 24314292. Its totient is φ = 5577216.

The previous prime is 11851841. The next prime is 11851859. The reversal of 11851856 is 65815811.

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 8317456 = 1880^2 + 2884^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11851859) 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, 21515 + ... + 22058.

Almost surely, 2^11851856 is an apocalyptic number.

11851856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11851856 is an abundant number, since it is smaller than the sum of its proper divisors (12462436).

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

11851856 is a wasteful number, since it uses less digits than its factorization.

11851856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43598 (or 43592 counting only the distinct ones).

The product of its digits is 9600, while the sum is 35.

The square root of 11851856 is about 3442.6524657595. The cubic root of 11851856 is about 227.9968194898.

The spelling of 11851856 in words is "eleven million, eight hundred fifty-one thousand, eight hundred fifty-six".