22238772 has 12 divisors (see below), whose sum is σ = 51890496. Its totient is φ = 7412920.

The previous prime is 22238743. The next prime is 22238779. The reversal of 22238772 is 27783222.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22238779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926604 + ... + 926627.

It is an arithmetic number, because the mean of its divisors is an integer number (4324208).

Almost surely, 2^22238772 is an apocalyptic number.

It is an amenable number.

22238772 is an abundant number, since it is smaller than the sum of its proper divisors (29651724).

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

22238772 is a wasteful number, since it uses less digits than its factorization.

22238772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853238 (or 1853236 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 22238772 is about 4715.8002502226. The cubic root of 22238772 is about 281.2139975644.

The spelling of 22238772 in words is "twenty-two million, two hundred thirty-eight thousand, seven hundred seventy-two".