18087448 has 16 divisors (see below), whose sum is σ = 33969960. Its totient is φ = 9028800.

The previous prime is 18087401. The next prime is 18087457. The reversal of 18087448 is 84478081.

It is a self number, because there is not a number n which added to its sum of digits gives 18087448.

It is a congruent number.

It is an unprimeable number.

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, 4603 + ... + 7573.

Almost surely, 2^18087448 is an apocalyptic number.

It is an amenable number.

18087448 is a deficient number, since it is larger than the sum of its proper divisors (15882512).

18087448 is a wasteful number, since it uses less digits than its factorization.

18087448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738 (or 3734 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 18087448 is about 4252.9340460440. The cubic root of 18087448 is about 262.4978587883.

The spelling of 18087448 in words is "eighteen million, eighty-seven thousand, four hundred forty-eight".