22418244 has 18 divisors (see below), whose sum is σ = 56668430. Its totient is φ = 7472736.

The previous prime is 22418237. The next prime is 22418273. The reversal of 22418244 is 44281422.

22418244 is a `hidden beast` number, since 2 + 2 + 418 + 244 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18662400 + 3755844 = 4320^2 + 1938^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311329 + ... + 311400.

Almost surely, 2^22418244 is an apocalyptic number.

It is an amenable number.

22418244 is an abundant number, since it is smaller than the sum of its proper divisors (34250186).

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

22418244 is a wasteful number, since it uses less digits than its factorization.

22418244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622739 (or 622734 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 22418244 is about 4734.7908084730. The cubic root of 22418244 is about 281.9684588233.

Adding to 22418244 its reverse (44281422), we get a palindrome (66699666).

The spelling of 22418244 in words is "twenty-two million, four hundred eighteen thousand, two hundred forty-four".