18648448 has 64 divisors (see below), whose sum is σ = 45753120. Its totient is φ = 7372800.

The previous prime is 18648431. The next prime is 18648449. The reversal of 18648448 is 84484681.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×18648448² = 695529225617408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18648449) 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, 10848 + ... + 12448.

Almost surely, 2^18648448 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 18648448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22876560).

18648448 is an abundant number, since it is smaller than the sum of its proper divisors (27104672).

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

18648448 is a wasteful number, since it uses less digits than its factorization.

18648448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635 (or 1623 counting only the distinct ones).

The product of its digits is 196608, while the sum is 43.

The square root of 18648448 is about 4318.3848832636. The cubic root of 18648448 is about 265.1841511048.

The spelling of 18648448 in words is "eighteen million, six hundred forty-eight thousand, four hundred forty-eight".