22540456 has 8 divisors (see below), whose sum is σ = 42263370. Its totient is φ = 11270224.

The previous prime is 22540451. The next prime is 22540459. The reversal of 22540456 is 65404522.

It can be written as a sum of positive squares in only one way, i.e., 15602500 + 6937956 = 3950^2 + 2634^2 .

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 (22540451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1408771 + ... + 1408786.

Almost surely, 2^22540456 is an apocalyptic number.

It is an amenable number.

22540456 is a deficient number, since it is larger than the sum of its proper divisors (19722914).

22540456 is a wasteful number, since it uses less digits than its factorization.

22540456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817563 (or 2817559 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 22540456 is about 4747.6790118962. The cubic root of 22540456 is about 282.4799098147.

Adding to 22540456 its reverse (65404522), we get a palindrome (87944978).

The spelling of 22540456 in words is "twenty-two million, five hundred forty thousand, four hundred fifty-six".