11855406 has 8 divisors (see below), whose sum is σ = 23710824. Its totient is φ = 3951800.

The previous prime is 11855387. The next prime is 11855407. The reversal of 11855406 is 60455811.

It is a sphenic number, since it is the product of 3 distinct primes.

11855406 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11855407) by changing a digit.

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, 987945 + ... + 987956.

It is an arithmetic number, because the mean of its divisors is an integer number (2963853).

Almost surely, 2^11855406 is an apocalyptic number.

11855406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11855406 is a wasteful number, since it uses less digits than its factorization.

11855406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975906.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 11855406 is about 3443.1680179741. The cubic root of 11855406 is about 228.0195812669.

The spelling of 11855406 in words is "eleven million, eight hundred fifty-five thousand, four hundred six".