22780765 has 16 divisors (see below), whose sum is σ = 33080832. Its totient is φ = 14701824.

The previous prime is 22780733. The next prime is 22780777. The reversal of 22780765 is 56708722.

It is a cyclic number.

It is not a de Polignac number, because 22780765 - 2⁵ = 22780733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18549 + ... + 19738.

It is an arithmetic number, because the mean of its divisors is an integer number (2067552).

Almost surely, 2^22780765 is an apocalyptic number.

It is an amenable number.

22780765 is a deficient number, since it is larger than the sum of its proper divisors (10300067).

22780765 is a wasteful number, since it uses less digits than its factorization.

22780765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38316.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 22780765 is about 4772.9199658071. The cubic root of 22780765 is about 283.4802244863.

The spelling of 22780765 in words is "twenty-two million, seven hundred eighty thousand, seven hundred sixty-five".