22266388 has 6 divisors (see below), whose sum is σ = 38966186. Its totient is φ = 11133192.

The previous prime is 22266383. The next prime is 22266407. The reversal of 22266388 is 88366222.

It can be written as a sum of positive squares in only one way, i.e., 22165264 + 101124 = 4708^2 + 318^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22266383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783295 + ... + 2783302.

Almost surely, 2^22266388 is an apocalyptic number.

It is an amenable number.

22266388 is a deficient number, since it is larger than the sum of its proper divisors (16699798).

22266388 is a wasteful number, since it uses less digits than its factorization.

22266388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566601 (or 5566599 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 22266388 is about 4718.7273708067. The cubic root of 22266388 is about 281.3303528107.

The spelling of 22266388 in words is "twenty-two million, two hundred sixty-six thousand, three hundred eighty-eight".