11638867 has 4 divisors (see below), whose sum is σ = 11664576. Its totient is φ = 11613160.

The previous prime is 11638819. The next prime is 11638873. The reversal of 11638867 is 76883611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11638867 - 2²³ = 3250259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11638807) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12163 + ... + 13084.

It is an arithmetic number, because the mean of its divisors is an integer number (2916144).

Almost surely, 2^11638867 is an apocalyptic number.

11638867 is a deficient number, since it is larger than the sum of its proper divisors (25709).

11638867 is an equidigital number, since it uses as much as digits as its factorization.

11638867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25708.

The product of its digits is 48384, while the sum is 40.

The square root of 11638867 is about 3411.5783737150. The cubic root of 11638867 is about 226.6227829789.

It can be divided in two parts, 116 and 38867, that added together give a palindrome (38983).

The spelling of 11638867 in words is "eleven million, six hundred thirty-eight thousand, eight hundred sixty-seven".