9799840 has 48 divisors (see below), whose sum is σ = 24167808. Its totient is φ = 3748096.

The previous prime is 9799831. The next prime is 9799843. The reversal of 9799840 is 489979.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (9799843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 5011.

It is an arithmetic number, because the mean of its divisors is an integer number (503496).

Almost surely, 2^9799840 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 9799840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12083904).

9799840 is an abundant number, since it is smaller than the sum of its proper divisors (14367968).

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

9799840 is a wasteful number, since it uses less digits than its factorization.

9799840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2701 (or 2693 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 9799840 is about 3130.4696133328. The cubic root of 9799840 is about 213.9963314945.

The spelling of 9799840 in words is "nine million, seven hundred ninety-nine thousand, eight hundred forty".