9489840 has 40 divisors (see below), whose sum is σ = 29419248. Its totient is φ = 2530560.

The previous prime is 9489833. The next prime is 9489841. The reversal of 9489840 is 489849.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9489792 and 9489801.

It is not an unprimeable number, because it can be changed into a prime (9489841) 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, 19531 + ... + 20010.

Almost surely, 2^9489840 is an apocalyptic number.

It is an amenable number.

9489840 is an abundant number, since it is smaller than the sum of its proper divisors (19929408).

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

9489840 is a wasteful number, since it uses less digits than its factorization.

9489840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39557 (or 39551 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 9489840 is about 3080.5583909415. The cubic root of 9489840 is about 211.7156505835.

The spelling of 9489840 in words is "nine million, four hundred eighty-nine thousand, eight hundred forty".