22785644 has 24 divisors (see below), whose sum is σ = 48252960. Its totient is φ = 9190656.

The previous prime is 22785641. The next prime is 22785649. The reversal of 22785644 is 44658722.

It is a junction number, because it is equal to n+sod(n) for n = 22785598 and 22785607.

It is not an unprimeable number, because it can be changed into a prime (22785641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23459 + ... + 24410.

It is an arithmetic number, because the mean of its divisors is an integer number (2010540).

Almost surely, 2^22785644 is an apocalyptic number.

It is an amenable number.

22785644 is an abundant number, since it is smaller than the sum of its proper divisors (25467316).

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

22785644 is a wasteful number, since it uses less digits than its factorization.

22785644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47897 (or 47895 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

The square root of 22785644 is about 4773.4310511413. The cubic root of 22785644 is about 283.5004608756.

The spelling of 22785644 in words is "twenty-two million, seven hundred eighty-five thousand, six hundred forty-four".