18448384 has 32 divisors (see below), whose sum is σ = 36961740. Its totient is φ = 9207808.

The previous prime is 18448361. The next prime is 18448387. The reversal of 18448384 is 48384481.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×18448384² = 680685744422912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32487 + ... + 33049.

Almost surely, 2^18448384 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 18448384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18480870).

18448384 is an abundant number, since it is smaller than the sum of its proper divisors (18513356).

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

18448384 is an frugal number, since it uses more digits than its factorization.

18448384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593 (or 565 counting only the distinct ones).

The product of its digits is 98304, while the sum is 40.

The square root of 18448384 is about 4295.1582043040. The cubic root of 18448384 is about 264.2324246377.

The spelling of 18448384 in words is "eighteen million, four hundred forty-eight thousand, three hundred eighty-four".