9869640 has 64 divisors (see below), whose sum is σ = 32304960. Its totient is φ = 2392320.

The previous prime is 9869633. The next prime is 9869641. The reversal of 9869640 is 469689.

It is a junction number, because it is equal to n+sod(n) for n = 9869592 and 9869601.

It is not an unprimeable number, because it can be changed into a prime (9869641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2419 + ... + 5058.

It is an arithmetic number, because the mean of its divisors is an integer number (504765).

Almost surely, 2^9869640 is an apocalyptic number.

It is an amenable number.

9869640 is an abundant number, since it is smaller than the sum of its proper divisors (22435320).

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

9869640 is a wasteful number, since it uses less digits than its factorization.

9869640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7502 (or 7498 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 9869640 is about 3141.5983193273. The cubic root of 9869640 is about 214.5031976094.

The spelling of 9869640 in words is "nine million, eight hundred sixty-nine thousand, six hundred forty".