9866724 has 48 divisors (see below), whose sum is σ = 27460608. Its totient is φ = 2695968.

The previous prime is 9866713. The next prime is 9866729. The reversal of 9866724 is 4276689.

9866724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9866729) 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, 622 + ... + 4485.

It is an arithmetic number, because the mean of its divisors is an integer number (572096).

Almost surely, 2^9866724 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 9866724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13730304).

9866724 is an abundant number, since it is smaller than the sum of its proper divisors (17593884).

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

9866724 is a wasteful number, since it uses less digits than its factorization.

9866724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144 (or 5142 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 9866724 is about 3141.1341900657. The cubic root of 9866724 is about 214.4820704310.

The spelling of 9866724 in words is "nine million, eight hundred sixty-six thousand, seven hundred twenty-four".