11728018 has 4 divisors (see below), whose sum is σ = 17592030. Its totient is φ = 5864008.

The previous prime is 11728007. The next prime is 11728021. The reversal of 11728018 is 81082711.

11728018 is digitally balanced in base 2, 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.

It can be written as a sum of positive squares in only one way, i.e., 10673289 + 1054729 = 3267^2 + 1027^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2932003 + ... + 2932006.

Almost surely, 2^11728018 is an apocalyptic number.

11728018 is a deficient number, since it is larger than the sum of its proper divisors (5864012).

11728018 is an equidigital number, since it uses as much as digits as its factorization.

11728018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864011.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 11728018 is about 3424.6193949109. The cubic root of 11728018 is about 227.1999376984.

The spelling of 11728018 in words is "eleven million, seven hundred twenty-eight thousand, eighteen".