11391986 has 8 divisors (see below), whose sum is σ = 17122224. Its totient is φ = 5684580.

The previous prime is 11391977. The next prime is 11391997. The reversal of 11391986 is 68919311.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4400 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (2140278).

Almost surely, 2^11391986 is an apocalyptic number.

11391986 is a deficient number, since it is larger than the sum of its proper divisors (5730238).

11391986 is a wasteful number, since it uses less digits than its factorization.

11391986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11416.

The product of its digits is 11664, while the sum is 38.

The square root of 11391986 is about 3375.2016236071. The cubic root of 11391986 is about 225.0089609600.

It can be divided in two parts, 1139 and 1986, that added together give a 5-th power (3125 = 5⁵).

The spelling of 11391986 in words is "eleven million, three hundred ninety-one thousand, nine hundred eighty-six".