22028766 has 8 divisors (see below), whose sum is σ = 44057544. Its totient is φ = 7342920.

The previous prime is 22028717. The next prime is 22028789. The reversal of 22028766 is 66782022.

It is a sphenic number, since it is the product of 3 distinct primes.

22028766 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1835725 + ... + 1835736.

It is an arithmetic number, because the mean of its divisors is an integer number (5507193).

Almost surely, 2^22028766 is an apocalyptic number.

22028766 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22028766 is a wasteful number, since it uses less digits than its factorization.

22028766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671466.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 22028766 is about 4693.4812239957. The cubic root of 22028766 is about 280.3260063352.

The spelling of 22028766 in words is "twenty-two million, twenty-eight thousand, seven hundred sixty-six".