22784772 has 24 divisors (see below), whose sum is σ = 53448192. Its totient is φ = 7554400.

The previous prime is 22784761. The next prime is 22784791. The reversal of 22784772 is 27748722.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 22784772.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2679 + ... + 7262.

It is an arithmetic number, because the mean of its divisors is an integer number (2227008).

Almost surely, 2^22784772 is an apocalyptic number.

It is an amenable number.

22784772 is an abundant number, since it is smaller than the sum of its proper divisors (30663420).

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

22784772 is a wasteful number, since it uses less digits than its factorization.

22784772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139 (or 10137 counting only the distinct ones).

The product of its digits is 87808, while the sum is 39.

The square root of 22784772 is about 4773.3397113551. The cubic root of 22784772 is about 283.4968443359.

The spelling of 22784772 in words is "twenty-two million, seven hundred eighty-four thousand, seven hundred seventy-two".