11856839 has 8 divisors (see below), whose sum is σ = 12030480. Its totient is φ = 11684736.

The previous prime is 11856821. The next prime is 11856841. The reversal of 11856839 is 93865811.

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

It is a cyclic number.

It is not a de Polignac number, because 11856839 - 2⁸ = 11856583 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11856796 and 11856805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11856899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27167 + ... + 27599.

It is an arithmetic number, because the mean of its divisors is an integer number (1503810).

Almost surely, 2^11856839 is an apocalyptic number.

11856839 is a deficient number, since it is larger than the sum of its proper divisors (173641).

11856839 is a wasteful number, since it uses less digits than its factorization.

11856839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its digits is 51840, while the sum is 41.

The square root of 11856839 is about 3443.3761049296. The cubic root of 11856839 is about 228.0287680434.

The spelling of 11856839 in words is "eleven million, eight hundred fifty-six thousand, eight hundred thirty-nine".