9899040 has 96 divisors (see below), whose sum is σ = 32006016. Its totient is φ = 2570240.

The previous prime is 9899023. The next prime is 9899041. The reversal of 9899040 is 409989.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 9899040.

It is not an unprimeable number, because it can be changed into a prime (9899041) 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, 19429 + ... + 19931.

It is an arithmetic number, because the mean of its divisors is an integer number (333396).

Almost surely, 2^9899040 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 9899040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16003008).

9899040 is an abundant number, since it is smaller than the sum of its proper divisors (22106976).

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

9899040 is a wasteful number, since it uses less digits than its factorization.

9899040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 9899040 is about 3146.2739867977. The cubic root of 9899040 is about 214.7159761388.

The spelling of 9899040 in words is "nine million, eight hundred ninety-nine thousand, forty".