18484224 has 88 divisors (see below), whose sum is σ = 53844288. Its totient is φ = 5591040.

The previous prime is 18484187. The next prime is 18484229. The reversal of 18484224 is 42248481.

It is a tau number, because it is divible by the number of its divisors (88).

It is a Harshad number since it is a multiple of its sum of digits (33).

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 (18484229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33519 + ... + 34065.

Almost surely, 2^18484224 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 18484224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26922144).

18484224 is an abundant number, since it is smaller than the sum of its proper divisors (35360064).

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

18484224 is a wasteful number, since it uses less digits than its factorization.

18484224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581 (or 563 counting only the distinct ones).

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

The square root of 18484224 is about 4299.3283196332. The cubic root of 18484224 is about 264.4034236104.

The spelling of 18484224 in words is "eighteen million, four hundred eighty-four thousand, two hundred twenty-four".