18448884 has 30 divisors (see below), whose sum is σ = 48229874. Its totient is φ = 6149520.

The previous prime is 18448883. The next prime is 18448891. The reversal of 18448884 is 48884481.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 2624400 = 3978^2 + 1620^2 .

It is a super-2 number, since 2×18448884² = 680722641690912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18448883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28147 + ... + 28794.

Almost surely, 2^18448884 is an apocalyptic number.

It is an amenable number.

18448884 is an abundant number, since it is smaller than the sum of its proper divisors (29780990).

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

18448884 is a wasteful number, since it uses less digits than its factorization.

18448884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56957 (or 56946 counting only the distinct ones).

The product of its digits is 262144, while the sum is 45.

The square root of 18448884 is about 4295.2164089834. The cubic root of 18448884 is about 264.2348117486.

The spelling of 18448884 in words is "eighteen million, four hundred forty-eight thousand, eight hundred eighty-four".