9724220 has 24 divisors (see below), whose sum is σ = 22277808. Its totient is φ = 3536000.

The previous prime is 9724213. The next prime is 9724223. The reversal of 9724220 is 224279.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9724220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9724223) 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, 21881 + ... + 22320.

It is an arithmetic number, because the mean of its divisors is an integer number (928242).

Almost surely, 2^9724220 is an apocalyptic number.

It is an amenable number.

9724220 is an abundant number, since it is smaller than the sum of its proper divisors (12553588).

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

9724220 is a wasteful number, since it uses less digits than its factorization.

9724220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44221 (or 44219 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 9724220 is about 3118.3681629981. The cubic root of 9724220 is about 213.4444787592. Note that the first 4 decimals are identical.

Adding to 9724220 its reverse (224279), we get a palindrome (9948499).

The spelling of 9724220 in words is "nine million, seven hundred twenty-four thousand, two hundred twenty".