9438640 has 40 divisors (see below), whose sum is σ = 22141440. Its totient is φ = 3741696.

The previous prime is 9438623. The next prime is 9438661. The reversal of 9438640 is 468349.

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

It is a junction number, because it is equal to n+sod(n) for n = 9438596 and 9438605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9696 + ... + 10624.

It is an arithmetic number, because the mean of its divisors is an integer number (553536).

Almost surely, 2^9438640 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 9438640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11070720).

9438640 is an abundant number, since it is smaller than the sum of its proper divisors (12702800).

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

9438640 is a wasteful number, since it uses less digits than its factorization.

9438640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069 (or 1063 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 9438640 is about 3072.2369700269. The cubic root of 9438640 is about 211.3342112588.

The spelling of 9438640 in words is "nine million, four hundred thirty-eight thousand, six hundred forty".