11217986 has 16 divisors (see below), whose sum is σ = 18239424. Its totient is φ = 5143824.

The previous prime is 11217959. The next prime is 11217989. The reversal of 11217986 is 68971211.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (11217989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2915 + ... + 5561.

It is an arithmetic number, because the mean of its divisors is an integer number (1139964).

Almost surely, 2^11217986 is an apocalyptic number.

11217986 is a deficient number, since it is larger than the sum of its proper divisors (7021438).

11217986 is a wasteful number, since it uses less digits than its factorization.

11217986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825.

The product of its digits is 6048, while the sum is 35.

The square root of 11217986 is about 3349.3262008947. The cubic root of 11217986 is about 223.8574906682.

The spelling of 11217986 in words is "eleven million, two hundred seventeen thousand, nine hundred eighty-six".