9913640 has 32 divisors (see below), whose sum is σ = 24334560. Its totient is φ = 3604800.

The previous prime is 9913637. The next prime is 9913643. The reversal of 9913640 is 463199.

It is an interprime number because it is at equal distance from previous prime (9913637) and next prime (9913643).

It is a junction number, because it is equal to n+sod(n) for n = 9913597 and 9913606.

It is not an unprimeable number, because it can be changed into a prime (9913643) 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, 10826 + ... + 11705.

It is an arithmetic number, because the mean of its divisors is an integer number (760455).

Almost surely, 2^9913640 is an apocalyptic number.

It is an amenable number.

9913640 is an abundant number, since it is smaller than the sum of its proper divisors (14420920).

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

9913640 is a wasteful number, since it uses less digits than its factorization.

9913640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22553 (or 22549 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 9913640 is about 3148.5933367140. The cubic root of 9913640 is about 214.8214851351.

The spelling of 9913640 in words is "nine million, nine hundred thirteen thousand, six hundred forty".