22262720 has 56 divisors (see below), whose sum is σ = 54864000. Its totient is φ = 8594432.

The previous prime is 22262717. The next prime is 22262731. The reversal of 22262720 is 2726222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8081 + ... + 10479.

Almost surely, 2^22262720 is an apocalyptic number.

22262720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22262720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27432000).

22262720 is an abundant number, since it is smaller than the sum of its proper divisors (32601280).

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

22262720 is a wasteful number, since it uses less digits than its factorization.

22262720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445 (or 2435 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 22262720 is about 4718.3386906834. The cubic root of 22262720 is about 281.3149038688.

Adding to 22262720 its reverse (2726222), we get a palindrome (24988942).

The spelling of 22262720 in words is "twenty-two million, two hundred sixty-two thousand, seven hundred twenty".