11965986 has 12 divisors (see below), whose sum is σ = 25926342. Its totient is φ = 3988656.

The previous prime is 11965979. The next prime is 11966023. The reversal of 11965986 is 68956911.

It can be written as a sum of positive squares in only one way, i.e., 7209225 + 4756761 = 2685^2 + 2181^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 332371 + ... + 332406.

Almost surely, 2^11965986 is an apocalyptic number.

11965986 is an abundant number, since it is smaller than the sum of its proper divisors (13960356).

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

11965986 is a wasteful number, since it uses less digits than its factorization.

11965986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664785 (or 664782 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 11965986 is about 3459.1886331913. The cubic root of 11965986 is about 228.7263309739.

The spelling of 11965986 in words is "eleven million, nine hundred sixty-five thousand, nine hundred eighty-six".