22272744 has 32 divisors (see below), whose sum is σ = 59965920. Its totient is φ = 6853056.

The previous prime is 22272727. The next prime is 22272749. The reversal of 22272744 is 44727222.

It is not an unprimeable number, because it can be changed into a prime (22272749) 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, 35382 + ... + 36005.

It is an arithmetic number, because the mean of its divisors is an integer number (1873935).

Almost surely, 2^22272744 is an apocalyptic number.

22272744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22272744 is an abundant number, since it is smaller than the sum of its proper divisors (37693176).

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

22272744 is a wasteful number, since it uses less digits than its factorization.

22272744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71409 (or 71405 counting only the distinct ones).

The product of its digits is 12544, while the sum is 30.

The square root of 22272744 is about 4719.4008094249. The cubic root of 22272744 is about 281.3571190978.

Adding to 22272744 its reverse (44727222), we get a palindrome (66999966).

The spelling of 22272744 in words is "twenty-two million, two hundred seventy-two thousand, seven hundred forty-four".