9640213940 has 96 divisors (see below), whose sum is σ = 23748076800. Its totient is φ = 3285706368.

The previous prime is 9640213909. The next prime is 9640214029. The reversal of 9640213940 is 493120469.

It is a junction number, because it is equal to n+sod(n) for n = 9640213894 and 9640213903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1182719 + ... + 1190841.

It is an arithmetic number, because the mean of its divisors is an integer number (247375800).

Almost surely, 2^9640213940 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 9640213940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11874038400).

9640213940 is an abundant number, since it is smaller than the sum of its proper divisors (14107862860).

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

9640213940 is a wasteful number, since it uses less digits than its factorization.

9640213940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8310 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 9640213940 is about 98184.5911536021. The cubic root of 9640213940 is about 2128.2806214644.

The spelling of 9640213940 in words is "nine billion, six hundred forty million, two hundred thirteen thousand, nine hundred forty".