11720885 has 16 divisors (see below), whose sum is σ = 15500160. Its totient is φ = 8437440.

The previous prime is 11720873. The next prime is 11720899. The reversal of 11720885 is 58802711.

It is a happy number.

It is not a de Polignac number, because 11720885 - 2¹⁴ = 11704501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4631 + ... + 6699.

It is an arithmetic number, because the mean of its divisors is an integer number (968760).

Almost surely, 2^11720885 is an apocalyptic number.

It is an amenable number.

11720885 is a deficient number, since it is larger than the sum of its proper divisors (3779275).

11720885 is a wasteful number, since it uses less digits than its factorization.

11720885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 11720885 is about 3423.5778069149. The cubic root of 11720885 is about 227.1538672307.

The spelling of 11720885 in words is "eleven million, seven hundred twenty thousand, eight hundred eighty-five".