18087648 has 96 divisors (see below), whose sum is σ = 50349600. Its totient is φ = 5677056.

The previous prime is 18087647. The next prime is 18087679. The reversal of 18087648 is 84678081.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203188 + ... + 203276.

It is an arithmetic number, because the mean of its divisors is an integer number (524475).

Almost surely, 2^18087648 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 18087648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25174800).

18087648 is an abundant number, since it is smaller than the sum of its proper divisors (32261952).

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

18087648 is a wasteful number, since it uses less digits than its factorization.

18087648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 18087648 is about 4252.9575591581. The cubic root of 18087648 is about 262.4988262986.

The spelling of 18087648 in words is "eighteen million, eighty-seven thousand, six hundred forty-eight".