11855438 has 16 divisors (see below), whose sum is σ = 20611584. Its totient is φ = 5008920.

The previous prime is 11855413. The next prime is 11855489. The reversal of 11855438 is 83455811.

It is a junction number, because it is equal to n+sod(n) for n = 11855398 and 11855407.

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 7 ways as a sum of consecutive naturals, for example, 4970 + ... + 6957.

It is an arithmetic number, because the mean of its divisors is an integer number (1288224).

Almost surely, 2^11855438 is an apocalyptic number.

11855438 is a deficient number, since it is larger than the sum of its proper divisors (8756146).

11855438 is a wasteful number, since it uses less digits than its factorization.

11855438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12007.

The product of its digits is 19200, while the sum is 35.

The square root of 11855438 is about 3443.1726648543. The cubic root of 11855438 is about 228.0197864228.

The spelling of 11855438 in words is "eleven million, eight hundred fifty-five thousand, four hundred thirty-eight".