18087248 has 20 divisors (see below), whose sum is σ = 35111220. Its totient is φ = 9026304.

The previous prime is 18087241. The next prime is 18087263. The reversal of 18087248 is 84278081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14961424 + 3125824 = 3868^2 + 1768^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18087241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13388 + ... + 14676.

It is an arithmetic number, because the mean of its divisors is an integer number (1755561).

Almost surely, 2^18087248 is an apocalyptic number.

It is an amenable number.

18087248 is a deficient number, since it is larger than the sum of its proper divisors (17023972).

18087248 is a wasteful number, since it uses less digits than its factorization.

18087248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174 (or 2168 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 18087248 is about 4252.9105327999. The cubic root of 18087248 is about 262.4968912708.

The spelling of 18087248 in words is "eighteen million, eighty-seven thousand, two hundred forty-eight".