9689840 has 20 divisors (see below), whose sum is σ = 22529064. Its totient is φ = 3875904.

The previous prime is 9689767. The next prime is 9689891. The reversal of 9689840 is 489869.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 9689791 and 9689800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60482 + ... + 60641.

Almost surely, 2^9689840 is an apocalyptic number.

It is an amenable number.

9689840 is an abundant number, since it is smaller than the sum of its proper divisors (12839224).

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

9689840 is a wasteful number, since it uses less digits than its factorization.

9689840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121136 (or 121130 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 9689840 is about 3112.8507834459. The cubic root of 9689840 is about 213.1926372643.

The spelling of 9689840 in words is "nine million, six hundred eighty-nine thousand, eight hundred forty".