22865128 has 96 divisors (see below), whose sum is σ = 53625600. Its totient is φ = 9060480.

The previous prime is 22865107. The next prime is 22865173. The reversal of 22865128 is 82156822.

Its product of digits (15360) is a multiple of the sum of its prime divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 22865093 and 22865102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289393 + ... + 289471.

It is an arithmetic number, because the mean of its divisors is an integer number (558600).

Almost surely, 2^22865128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22865128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26812800).

22865128 is an abundant number, since it is smaller than the sum of its proper divisors (30760472).

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

22865128 is a wasteful number, since it uses less digits than its factorization.

22865128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 128 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 22865128 is about 4781.7494706436. The cubic root of 22865128 is about 283.8297266700.

It can be divided in two parts, 228 and 65128, that added together give a palindrome (65356).

The spelling of 22865128 in words is "twenty-two million, eight hundred sixty-five thousand, one hundred twenty-eight".