11728187 has 4 divisors (see below), whose sum is σ = 12345480. Its totient is φ = 11110896.

The previous prime is 11728177. The next prime is 11728217. The reversal of 11728187 is 78182711.

11728187 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78182711 = 17 ⋅4598983.

It is not a de Polignac number, because 11728187 - 2¹⁸ = 11466043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728117) 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, 308618 + ... + 308655.

It is an arithmetic number, because the mean of its divisors is an integer number (3086370).

Almost surely, 2^11728187 is an apocalyptic number.

11728187 is a deficient number, since it is larger than the sum of its proper divisors (617293).

11728187 is an equidigital number, since it uses as much as digits as its factorization.

11728187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617292.

The product of its digits is 6272, while the sum is 35.

The square root of 11728187 is about 3424.6440690968. The cubic root of 11728187 is about 227.2010290054.

The spelling of 11728187 in words is "eleven million, seven hundred twenty-eight thousand, one hundred eighty-seven".