22144456 has 8 divisors (see below), whose sum is σ = 41520870. Its totient is φ = 11072224.

The previous prime is 22144453. The next prime is 22144471. The reversal of 22144456 is 65444122.

It can be written as a sum of positive squares in only one way, i.e., 18404100 + 3740356 = 4290^2 + 1934^2 .

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

It is not an unprimeable number, because it can be changed into a prime (22144453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1384021 + ... + 1384036.

Almost surely, 2^22144456 is an apocalyptic number.

It is an amenable number.

22144456 is a deficient number, since it is larger than the sum of its proper divisors (19376414).

22144456 is a wasteful number, since it uses less digits than its factorization.

22144456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768063 (or 2768059 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 22144456 is about 4705.7896255570. The cubic root of 22144456 is about 280.8158856065.

Adding to 22144456 its reverse (65444122), we get a palindrome (87588578).

It can be divided in two parts, 2214 and 4456, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 22144456 in words is "twenty-two million, one hundred forty-four thousand, four hundred fifty-six".