11857856 has 28 divisors (see below), whose sum is σ = 24109680. Its totient is φ = 5783040.

The previous prime is 11857837. The next prime is 11857873. The reversal of 11857856 is 65875811.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365 + ... + 4883.

It is an arithmetic number, because the mean of its divisors is an integer number (861060).

Almost surely, 2^11857856 is an apocalyptic number.

11857856 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 11857856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12054840).

11857856 is an abundant number, since it is smaller than the sum of its proper divisors (12251824).

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

11857856 is an equidigital number, since it uses as much as digits as its factorization.

11857856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4572 (or 4562 counting only the distinct ones).

The product of its digits is 67200, while the sum is 41.

The square root of 11857856 is about 3443.5237765986. The cubic root of 11857856 is about 228.0352874489.

The spelling of 11857856 in words is "eleven million, eight hundred fifty-seven thousand, eight hundred fifty-six".