18448644 has 36 divisors (see below), whose sum is σ = 44281104. Its totient is φ = 5978016.

The previous prime is 18448643. The next prime is 18448663. The reversal of 18448644 is 44684481.

It is not an unprimeable number, because it can be changed into a prime (18448643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15867 + ... + 16989.

Almost surely, 2^18448644 is an apocalyptic number.

It is an amenable number.

18448644 is an abundant number, since it is smaller than the sum of its proper divisors (25832460).

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

18448644 is a wasteful number, since it uses less digits than its factorization.

18448644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1165 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 18448644 is about 4295.1884708357. The cubic root of 18448644 is about 264.2336659408.

It can be divided in two parts, 184 and 48644, that added together give a triangular number (48828 = T₃₁₂).

The spelling of 18448644 in words is "eighteen million, four hundred forty-eight thousand, six hundred forty-four".