9881385 has 16 divisors (see below), whose sum is σ = 15897600. Its totient is φ = 5240960.

The previous prime is 9881381. The next prime is 9881401. The reversal of 9881385 is 5831889.

9881385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9881385 - 2² = 9881381 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9881381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141 + ... + 4589.

It is an arithmetic number, because the mean of its divisors is an integer number (993600).

Almost surely, 2^9881385 is an apocalyptic number.

It is an amenable number.

9881385 is a deficient number, since it is larger than the sum of its proper divisors (6016215).

9881385 is a wasteful number, since it uses less digits than its factorization.

9881385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its digits is 69120, while the sum is 42.

The square root of 9881385 is about 3143.4670349791. The cubic root of 9881385 is about 214.5882510786.

The spelling of 9881385 in words is "nine million, eight hundred eighty-one thousand, three hundred eighty-five".