11813986 has 8 divisors (see below), whose sum is σ = 18153324. Its totient is φ = 5762880.

The previous prime is 11813969. The next prime is 11813987. The reversal of 11813986 is 68931811.

It can be written as a sum of positive squares in 2 ways, for example, as 11594025 + 219961 = 3405^2 + 469^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11813987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71955 + ... + 72118.

Almost surely, 2^11813986 is an apocalyptic number.

11813986 is a deficient number, since it is larger than the sum of its proper divisors (6339338).

11813986 is a wasteful number, since it uses less digits than its factorization.

11813986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144116.

The product of its digits is 10368, while the sum is 37.

The square root of 11813986 is about 3437.1479456084. The cubic root of 11813986 is about 227.7537224822.

The spelling of 11813986 in words is "eleven million, eight hundred thirteen thousand, nine hundred eighty-six".