9999240 has 64 divisors (see below), whose sum is σ = 30326400. Its totient is φ = 2637312.

The previous prime is 9999233. The next prime is 9999271. The reversal of 9999240 is 429999.

It is a junction number, because it is equal to n+sod(n) for n = 9999192 and 9999201.

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, 11956 + ... + 12764.

It is an arithmetic number, because the mean of its divisors is an integer number (473850).

Almost surely, 2^9999240 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 9999240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15163200).

9999240 is an abundant number, since it is smaller than the sum of its proper divisors (20327160).

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

9999240 is a wasteful number, since it uses less digits than its factorization.

9999240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 922 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 9999240 is about 3162.1574913340. The cubic root of 9999240 is about 215.4380109637.

The spelling of 9999240 in words is "nine million, nine hundred ninety-nine thousand, two hundred forty".