9938640 has 40 divisors (see below), whose sum is σ = 30810528. Its totient is φ = 2650240.

The previous prime is 9938623. The next prime is 9938641. The reversal of 9938640 is 468399.

9938640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20466 + ... + 20945.

Almost surely, 2^9938640 is an apocalyptic number.

It is an amenable number.

9938640 is an abundant number, since it is smaller than the sum of its proper divisors (20871888).

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

9938640 is a wasteful number, since it uses less digits than its factorization.

9938640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41427 (or 41421 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 9938640 is about 3152.5608638058. The cubic root of 9938640 is about 215.0019109259.

The spelling of 9938640 in words is "nine million, nine hundred thirty-eight thousand, six hundred forty".