9894385844 has 48 divisors (see below), whose sum is σ = 20515856256. Its totient is φ = 4087142400.

The previous prime is 9894385841. The next prime is 9894385859. The reversal of 9894385844 is 4485834989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9894385841) 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, 43364 + ... + 147204.

It is an arithmetic number, because the mean of its divisors is an integer number (427413672).

Almost surely, 2^9894385844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9894385844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10257928128).

9894385844 is an abundant number, since it is smaller than the sum of its proper divisors (10621470412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9894385844 is a wasteful number, since it uses less digits than its factorization.

9894385844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103976 (or 103974 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 62.

The square root of 9894385844 is about 99470.5275144351. The cubic root of 9894385844 is about 2146.8232040708.

The spelling of 9894385844 in words is "nine billion, eight hundred ninety-four million, three hundred eighty-five thousand, eight hundred forty-four".