9720222 has 16 divisors (see below), whose sum is σ = 19488000. Its totient is φ = 3232152.

The previous prime is 9720203. The next prime is 9720223. The reversal of 9720222 is 2220279.

It is a junction number, because it is equal to n+sod(n) for n = 9720192 and 9720201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1029 + ... + 4527.

It is an arithmetic number, because the mean of its divisors is an integer number (1218000).

Almost surely, 2^9720222 is an apocalyptic number.

9720222 is an abundant number, since it is smaller than the sum of its proper divisors (9767778).

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

9720222 is a wasteful number, since it uses less digits than its factorization.

9720222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 9720222 is about 3117.7270566873. The cubic root of 9720222 is about 213.4152230108.

The spelling of 9720222 in words is "nine million, seven hundred twenty thousand, two hundred twenty-two".