18385648 has 40 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 8597952.

The previous prime is 18385643. The next prime is 18385651. The reversal of 18385648 is 84658381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385643) 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, 16765 + ... + 17827.

Almost surely, 2^18385648 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 18385648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18998784).

18385648 is an abundant number, since it is smaller than the sum of its proper divisors (19611920).

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

18385648 is a wasteful number, since it uses less digits than its factorization.

18385648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141 (or 1135 counting only the distinct ones).

The product of its digits is 184320, while the sum is 43.

The square root of 18385648 is about 4287.8488779340. The cubic root of 18385648 is about 263.9325661866.

The spelling of 18385648 in words is "eighteen million, three hundred eighty-five thousand, six hundred forty-eight".