11819985 has 8 divisors (see below), whose sum is σ = 18912000. Its totient is φ = 6303984.

The previous prime is 11819921. The next prime is 11819987. The reversal of 11819985 is 58991811.

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

It is not a de Polignac number, because 11819985 - 2⁶ = 11819921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11819987) 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, 393985 + ... + 394014.

It is an arithmetic number, because the mean of its divisors is an integer number (2364000).

Almost surely, 2^11819985 is an apocalyptic number.

11819985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11819985 is a deficient number, since it is larger than the sum of its proper divisors (7092015).

11819985 is an equidigital number, since it uses as much as digits as its factorization.

11819985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788007.

The product of its digits is 25920, while the sum is 42.

The square root of 11819985 is about 3438.0205060470. The cubic root of 11819985 is about 227.7922661593.

The spelling of 11819985 in words is "eleven million, eight hundred nineteen thousand, nine hundred eighty-five".