7912224 has 72 divisors (see below), whose sum is σ = 22840272. Its totient is φ = 2597760.

The previous prime is 7912217. The next prime is 7912237. The reversal of 7912224 is 4222197.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23739 + ... + 24069.

It is an arithmetic number, because the mean of its divisors is an integer number (317226).

Almost surely, 2^7912224 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 7912224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11420136).

7912224 is an abundant number, since it is smaller than the sum of its proper divisors (14928048).

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

7912224 is a wasteful number, since it uses less digits than its factorization.

7912224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 419 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 7912224 is about 2812.8675759801. The cubic root of 7912224 is about 199.2658416887.

Subtracting from 7912224 its sum of digits (27), we obtain a palindrome (7912197).

The spelling of 7912224 in words is "seven million, nine hundred twelve thousand, two hundred twenty-four".