22865778 has 96 divisors (see below), whose sum is σ = 58094400. Its totient is φ = 6438528.

The previous prime is 22865771. The next prime is 22865783. The reversal of 22865778 is 87756822.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (22865771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164433 + ... + 164571.

It is an arithmetic number, because the mean of its divisors is an integer number (605150).

Almost surely, 2^22865778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22865778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29047200).

22865778 is an abundant number, since it is smaller than the sum of its proper divisors (35228622).

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

22865778 is a wasteful number, since it uses less digits than its factorization.

22865778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 213 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 22865778 is about 4781.8174369166. The cubic root of 22865778 is about 283.8324161742.

The spelling of 22865778 in words is "twenty-two million, eight hundred sixty-five thousand, seven hundred seventy-eight".