18844224 has 84 divisors (see below), whose sum is σ = 58027824. Its totient is φ = 5381376.

The previous prime is 18844207. The next prime is 18844283. The reversal of 18844224 is 42244881.

It is a tau number, because it is divible by the number of its divisors (84).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8407 + ... + 10409.

Almost surely, 2^18844224 is an apocalyptic number.

18844224 is a gapful number since it is divisible by the number (14) 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 18844224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29013912).

18844224 is an abundant number, since it is smaller than the sum of its proper divisors (39183600).

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

18844224 is a wasteful number, since it uses less digits than its factorization.

18844224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032 (or 2015 counting only the distinct ones).

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

The square root of 18844224 is about 4340.9934346875. The cubic root of 18844224 is about 266.1089120026.

The spelling of 18844224 in words is "eighteen million, eight hundred forty-four thousand, two hundred twenty-four".