18438086 has 8 divisors (see below), whose sum is σ = 27781824. Its totient is φ = 9177480.

The previous prime is 18438083. The next prime is 18438089. The reversal of 18438086 is 68083481.

It is an interprime number because it is at equal distance from previous prime (18438083) and next prime (18438089).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18438083) 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, 20225 + ... + 21116.

It is an arithmetic number, because the mean of its divisors is an integer number (3472728).

Almost surely, 2^18438086 is an apocalyptic number.

18438086 is a deficient number, since it is larger than the sum of its proper divisors (9343738).

18438086 is a wasteful number, since it uses less digits than its factorization.

18438086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41566.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 18438086 is about 4293.9592452654. The cubic root of 18438086 is about 264.1832501053.

The spelling of 18438086 in words is "eighteen million, four hundred thirty-eight thousand, eighty-six".