11728779 has 4 divisors (see below), whose sum is σ = 15638376. Its totient is φ = 7819184.

The previous prime is 11728777. The next prime is 11728799. The reversal of 11728779 is 97782711.

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 11728779 - 2¹ = 11728777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11728779.

It is not an unprimeable number, because it can be changed into a prime (11728777) 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, 1954794 + ... + 1954799.

It is an arithmetic number, because the mean of its divisors is an integer number (3909594).

Almost surely, 2^11728779 is an apocalyptic number.

11728779 is a deficient number, since it is larger than the sum of its proper divisors (3909597).

11728779 is an equidigital number, since it uses as much as digits as its factorization.

11728779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3909596.

The product of its digits is 49392, while the sum is 42.

The square root of 11728779 is about 3424.7305003460. The cubic root of 11728779 is about 227.2048517260.

The spelling of 11728779 in words is "eleven million, seven hundred twenty-eight thousand, seven hundred seventy-nine".