9875840 has 64 divisors (see below), whose sum is σ = 25446960. Its totient is φ = 3643392.

The previous prime is 9875821. The next prime is 9875893. The reversal of 9875840 is 485789.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7727 + ... + 8913.

Almost surely, 2^9875840 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 9875840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12723480).

9875840 is an abundant number, since it is smaller than the sum of its proper divisors (15571120).

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

9875840 is a wasteful number, since it uses less digits than its factorization.

9875840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 9875840 is about 3142.5849232757. The cubic root of 9875840 is about 214.5481043956.

The spelling of 9875840 in words is "nine million, eight hundred seventy-five thousand, eight hundred forty".