22636866 has 48 divisors (see below), whose sum is σ = 54644544. Its totient is φ = 6123168.

The previous prime is 22636841. The next prime is 22636871. The reversal of 22636866 is 66863622.

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 an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 14416 + ... + 15908.

It is an arithmetic number, because the mean of its divisors is an integer number (1138428).

Almost surely, 2^22636866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22636866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27322272).

22636866 is an abundant number, since it is smaller than the sum of its proper divisors (32007678).

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

22636866 is a wasteful number, since it uses less digits than its factorization.

22636866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543 (or 1524 counting only the distinct ones).

The product of its digits is 124416, while the sum is 39.

The square root of 22636866 is about 4757.8215603362. The cubic root of 22636866 is about 282.8820778374.

The spelling of 22636866 in words is "twenty-two million, six hundred thirty-six thousand, eight hundred sixty-six".