22784229 has 24 divisors (see below), whose sum is σ = 35661080. Its totient is φ = 13934592.

The previous prime is 22784189. The next prime is 22784243. The reversal of 22784229 is 92248722.

It is a happy number.

22784229 is a `hidden beast` number, since 227 + 8 + 422 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31329 + 22752900 = 177^2 + 4770^2 .

It is not a de Polignac number, because 22784229 - 2¹¹ = 22782181 is a prime.

It is a super-2 number, since 2×22784229² = 1038242182248882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22784193 and 22784202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22784269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22077 + ... + 23085.

Almost surely, 2^22784229 is an apocalyptic number.

It is an amenable number.

22784229 is a deficient number, since it is larger than the sum of its proper divisors (12876851).

22784229 is a wasteful number, since it uses less digits than its factorization.

22784229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1218 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 22784229 is about 4773.2828326006. The cubic root of 22784229 is about 283.4945922468.

The spelling of 22784229 in words is "twenty-two million, seven hundred eighty-four thousand, two hundred twenty-nine".