22724136 has 24 divisors (see below), whose sum is σ = 61544730. Its totient is φ = 7574688.

The previous prime is 22724129. The next prime is 22724173. The reversal of 22724136 is 63142722.

It can be written as a sum of positive squares in only one way, i.e., 20196036 + 2528100 = 4494^2 + 1590^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 157735 + ... + 157878.

Almost surely, 2^22724136 is an apocalyptic number.

It is an amenable number.

22724136 is an abundant number, since it is smaller than the sum of its proper divisors (38820594).

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

22724136 is a wasteful number, since it uses less digits than its factorization.

22724136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315625 (or 315618 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 22724136 is about 4766.9839521442. The cubic root of 22724136 is about 283.2451354854.

Adding to 22724136 its reverse (63142722), we get a palindrome (85866858).

The spelling of 22724136 in words is "twenty-two million, seven hundred twenty-four thousand, one hundred thirty-six".