22664736 has 36 divisors (see below), whose sum is σ = 64453662. Its totient is φ = 7554816.

The previous prime is 22664731. The next prime is 22664743. The reversal of 22664736 is 63746622.

It is a happy number.

22664736 is a `hidden beast` number, since 2 + 2 + 6 + 647 + 3 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 197136 = 4740^2 + 444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 22664736.

It is not an unprimeable number, because it can be changed into a prime (22664731) 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 in 5 ways as a sum of consecutive naturals, for example, 39061 + ... + 39636.

Almost surely, 2^22664736 is an apocalyptic number.

It is an amenable number.

22664736 is an abundant number, since it is smaller than the sum of its proper divisors (41788926).

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

22664736 is a wasteful number, since it uses less digits than its factorization.

22664736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78713 (or 78702 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 22664736 is about 4760.7495208213. The cubic root of 22664736 is about 282.9981229091.

The spelling of 22664736 in words is "twenty-two million, six hundred sixty-four thousand, seven hundred thirty-six".