9381640 has 16 divisors (see below), whose sum is σ = 21108780. Its totient is φ = 3752640.

The previous prime is 9381607. The next prime is 9381643. The reversal of 9381640 is 461839.

It can be written as a sum of positive squares in 2 ways, for example, as 9351364 + 30276 = 3058^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (9381643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117231 + ... + 117310.

Almost surely, 2^9381640 is an apocalyptic number.

It is an amenable number.

9381640 is an abundant number, since it is smaller than the sum of its proper divisors (11727140).

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

9381640 is a wasteful number, since it uses less digits than its factorization.

9381640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234552 (or 234548 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 9381640 is about 3062.9462940117. The cubic root of 9381640 is about 210.9079358475.

The spelling of 9381640 in words is "nine million, three hundred eighty-one thousand, six hundred forty".