9659940 has 48 divisors (see below), whose sum is σ = 27276480. Its totient is φ = 2554240.

The previous prime is 9659921. The next prime is 9659953. The reversal of 9659940 is 499569.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9659892 and 9659901.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7246 + ... + 8474.

It is an arithmetic number, because the mean of its divisors is an integer number (568260).

Almost surely, 2^9659940 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 9659940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13638240).

9659940 is an abundant number, since it is smaller than the sum of its proper divisors (17616540).

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

9659940 is a wasteful number, since it uses less digits than its factorization.

9659940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 9659940 is about 3108.0444012272. The cubic root of 9659940 is about 212.9731280433.

The spelling of 9659940 in words is "nine million, six hundred fifty-nine thousand, nine hundred forty".