11881785 has 8 divisors (see below), whose sum is σ = 19010880. Its totient is φ = 6336944.

The previous prime is 11881781. The next prime is 11881787. The reversal of 11881785 is 58718811.

11881785 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 11881785 - 2² = 11881781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11881781) 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 7 ways as a sum of consecutive naturals, for example, 396045 + ... + 396074.

It is an arithmetic number, because the mean of its divisors is an integer number (2376360).

Almost surely, 2^11881785 is an apocalyptic number.

11881785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11881785 is a deficient number, since it is larger than the sum of its proper divisors (7129095).

11881785 is an equidigital number, since it uses as much as digits as its factorization.

11881785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792127.

The product of its digits is 17920, while the sum is 39.

The square root of 11881785 is about 3446.9965187102. The cubic root of 11881785 is about 228.1885751376.

The spelling of 11881785 in words is "eleven million, eight hundred eighty-one thousand, seven hundred eighty-five".