22488144 has 160 divisors (see below), whose sum is σ = 73138176. Its totient is φ = 5806080.

The previous prime is 22488143. The next prime is 22488157. The reversal of 22488144 is 44188422.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22488143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177009 + ... + 177135.

Almost surely, 2^22488144 is an apocalyptic number.

22488144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22488144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36569088).

22488144 is an abundant number, since it is smaller than the sum of its proper divisors (50650032).

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

22488144 is a wasteful number, since it uses less digits than its factorization.

22488144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 187 counting only the distinct ones).

The product of its digits is 16384, while the sum is 33.

The square root of 22488144 is about 4742.1665934465. The cubic root of 22488144 is about 282.2612136270.

The spelling of 22488144 in words is "twenty-two million, four hundred eighty-eight thousand, one hundred forty-four".