9221872 has 40 divisors (see below), whose sum is σ = 19677312. Its totient is φ = 4152000.

The previous prime is 9221867. The next prime is 9221879. The reversal of 9221872 is 2781229.

9221872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9221879) 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, 26403 + ... + 26749.

Almost surely, 2^9221872 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 9221872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9838656).

9221872 is an abundant number, since it is smaller than the sum of its proper divisors (10455440).

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

9221872 is a wasteful number, since it uses less digits than its factorization.

9221872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 511 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 9221872 is about 3036.7535296761. The cubic root of 9221872 is about 209.7038304205.

The spelling of 9221872 in words is "nine million, two hundred twenty-one thousand, eight hundred seventy-two".