11728655 has 4 divisors (see below), whose sum is σ = 14074392. Its totient is φ = 9382920.

The previous prime is 11728649. The next prime is 11728663. The reversal of 11728655 is 55682711.

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

It is not a de Polignac number, because 11728655 - 2¹⁴ = 11712271 is a prime.

It is a super-2 number, since 2×11728655² = 275122696218050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172861 + ... + 1172870.

It is an arithmetic number, because the mean of its divisors is an integer number (3518598).

Almost surely, 2^11728655 is an apocalyptic number.

11728655 is a deficient number, since it is larger than the sum of its proper divisors (2345737).

11728655 is an equidigital number, since it uses as much as digits as its factorization.

11728655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345736.

The product of its digits is 16800, while the sum is 35.

The square root of 11728655 is about 3424.7123966838. The cubic root of 11728655 is about 227.2040510316.

The spelling of 11728655 in words is "eleven million, seven hundred twenty-eight thousand, six hundred fifty-five".