22280766 has 8 divisors (see below), whose sum is σ = 44561544. Its totient is φ = 7426920.

The previous prime is 22280743. The next prime is 22280779. The reversal of 22280766 is 66708222.

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

22280766 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1856725 + ... + 1856736.

It is an arithmetic number, because the mean of its divisors is an integer number (5570193).

Almost surely, 2^22280766 is an apocalyptic number.

22280766 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.

22280766 is a wasteful number, since it uses less digits than its factorization.

22280766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713466.

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

The square root of 22280766 is about 4720.2506289391. The cubic root of 22280766 is about 281.3908939497.

Adding to 22280766 its reverse (66708222), we get a palindrome (88988988).

The spelling of 22280766 in words is "twenty-two million, two hundred eighty thousand, seven hundred sixty-six".