22726216 has 8 divisors (see below), whose sum is σ = 42611670. Its totient is φ = 11363104.

The previous prime is 22726181. The next prime is 22726217. The reversal of 22726216 is 61262722.

It can be written as a sum of positive squares in only one way, i.e., 17222500 + 5503716 = 4150^2 + 2346^2 .

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 (22726217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1420381 + ... + 1420396.

Almost surely, 2^22726216 is an apocalyptic number.

It is an amenable number.

22726216 is a deficient number, since it is larger than the sum of its proper divisors (19885454).

22726216 is a wasteful number, since it uses less digits than its factorization.

22726216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2840783 (or 2840779 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 22726216 is about 4767.2021144483. The cubic root of 22726216 is about 283.2537772794.

Adding to 22726216 its reverse (61262722), we get a palindrome (83988938).

The spelling of 22726216 in words is "twenty-two million, seven hundred twenty-six thousand, two hundred sixteen".