22240424 has 8 divisors (see below), whose sum is σ = 41700810. Its totient is φ = 11120208.

The previous prime is 22240397. The next prime is 22240429. The reversal of 22240424 is 42404222.

It can be written as a sum of positive squares in only one way, i.e., 16080100 + 6160324 = 4010^2 + 2482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22240396 and 22240405.

It is not an unprimeable number, because it can be changed into a prime (22240429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390019 + ... + 1390034.

Almost surely, 2^22240424 is an apocalyptic number.

It is an amenable number.

22240424 is a deficient number, since it is larger than the sum of its proper divisors (19460386).

22240424 is a wasteful number, since it uses less digits than its factorization.

22240424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780059 (or 2780055 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 22240424 is about 4715.9754028197. The cubic root of 22240424 is about 281.2209606890.

Adding to 22240424 its reverse (42404222), we get a palindrome (64644646).

The spelling of 22240424 in words is "twenty-two million, two hundred forty thousand, four hundred twenty-four".