9911385 has 24 divisors (see below), whose sum is σ = 18742464. Its totient is φ = 4805280.

The previous prime is 9911353. The next prime is 9911399. The reversal of 9911385 is 5831199.

It is a happy number.

It is not a de Polignac number, because 9911385 - 2⁵ = 9911353 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 9517 + ... + 10506.

It is an arithmetic number, because the mean of its divisors is an integer number (780936).

Almost surely, 2^9911385 is an apocalyptic number.

It is an amenable number.

9911385 is a deficient number, since it is larger than the sum of its proper divisors (8831079).

9911385 is a wasteful number, since it uses less digits than its factorization.

9911385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20045 (or 20042 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 9911385 is about 3148.2352199288. The cubic root of 9911385 is about 214.8051958212.

It can be divided in two parts, 9911 and 385, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 9911385 in words is "nine million, nine hundred eleven thousand, three hundred eighty-five".