18030286 has 8 divisors (see below), whose sum is σ = 27978120. Its totient is φ = 8704248.

The previous prime is 18030241. The next prime is 18030293. The reversal of 18030286 is 68203081.

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

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, 155376 + ... + 155491.

It is an arithmetic number, because the mean of its divisors is an integer number (3497265).

Almost surely, 2^18030286 is an apocalyptic number.

18030286 is a deficient number, since it is larger than the sum of its proper divisors (9947834).

18030286 is a wasteful number, since it uses less digits than its factorization.

18030286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310898.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 18030286 is about 4246.2084263493. The cubic root of 18030286 is about 262.2210418276.

The spelling of 18030286 in words is "eighteen million, thirty thousand, two hundred eighty-six".