22788144 has 60 divisors (see below), whose sum is σ = 67139800. Its totient is φ = 7195392.

The previous prime is 22788127. The next prime is 22788149. The reversal of 22788144 is 44188722.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 22788099 and 22788108.

It is not an unprimeable number, because it can be changed into a prime (22788149) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1429 + ... + 6900.

Almost surely, 2^22788144 is an apocalyptic number.

22788144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22788144 is an abundant number, since it is smaller than the sum of its proper divisors (44351656).

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

22788144 is a wasteful number, since it uses less digits than its factorization.

22788144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8362 (or 8353 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 22788144 is about 4773.6929101064. The cubic root of 22788144 is about 283.5108288838.

The spelling of 22788144 in words is "twenty-two million, seven hundred eighty-eight thousand, one hundred forty-four".