18087396 has 48 divisors (see below), whose sum is σ = 43794240. Its totient is φ = 5806080.

The previous prime is 18087389. The next prime is 18087397. The reversal of 18087396 is 69378081.

It is not an unprimeable number, because it can be changed into a prime (18087397) 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, 47535 + ... + 47913.

It is an arithmetic number, because the mean of its divisors is an integer number (912380).

Almost surely, 2^18087396 is an apocalyptic number.

It is an amenable number.

18087396 is an abundant number, since it is smaller than the sum of its proper divisors (25706844).

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

18087396 is a wasteful number, since it uses less digits than its factorization.

18087396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 522 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 18087396 is about 4252.9279326130. The cubic root of 18087396 is about 262.4976072344.

The spelling of 18087396 in words is "eighteen million, eighty-seven thousand, three hundred ninety-six".