11728823 has 4 divisors (see below), whose sum is σ = 11818488. Its totient is φ = 11639160.

The previous prime is 11728817. The next prime is 11728841. The reversal of 11728823 is 32882711.

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 11728823 - 2⁴ = 11728807 is a prime.

It is a super-3 number, since 3×11728823³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11728823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44636 + ... + 44897.

It is an arithmetic number, because the mean of its divisors is an integer number (2954622).

Almost surely, 2^11728823 is an apocalyptic number.

11728823 is a deficient number, since it is larger than the sum of its proper divisors (89665).

11728823 is an equidigital number, since it uses as much as digits as its factorization.

11728823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89664.

The product of its digits is 5376, while the sum is 32.

The square root of 11728823 is about 3424.7369242031. The cubic root of 11728823 is about 227.2051358420.

The spelling of 11728823 in words is "eleven million, seven hundred twenty-eight thousand, eight hundred twenty-three".