11786985 has 32 divisors (see below), whose sum is σ = 23950080. Its totient is φ = 5387904.

The previous prime is 11786981. The next prime is 11786993. The reversal of 11786985 is 58968711.

It is not a de Polignac number, because 11786985 - 2² = 11786981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11786985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11786981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5292 + ... + 7181.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^11786985 is an apocalyptic number.

11786985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11786985 is an abundant number, since it is smaller than the sum of its proper divisors (12163095).

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

11786985 is a wasteful number, since it uses less digits than its factorization.

11786985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12494 (or 12488 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 11786985 is about 3433.2178783177. The cubic root of 11786985 is about 227.5800788817.

The spelling of 11786985 in words is "eleven million, seven hundred eighty-six thousand, nine hundred eighty-five".