9539940 has 96 divisors (see below), whose sum is σ = 28901376. Its totient is φ = 2344320.

The previous prime is 9539939. The next prime is 9539951. The reversal of 9539940 is 499359.

9539940 = 633² + 634² + ... + 655².

It is a happy 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, 42669 + ... + 42891.

It is an arithmetic number, because the mean of its divisors is an integer number (301056).

Almost surely, 2^9539940 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 9539940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14450688).

9539940 is an abundant number, since it is smaller than the sum of its proper divisors (19361436).

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

9539940 is a wasteful number, since it uses less digits than its factorization.

9539940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 9539940 is about 3088.6793294222. The cubic root of 9539940 is about 212.0875691398.

The spelling of 9539940 in words is "nine million, five hundred thirty-nine thousand, nine hundred forty".